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+Εισαγωγή στο Διαδίκτυο των Αντικειμένων !
+----------------------------------------
+
+Ορισμός, βασικά χαρακτηριστικά και αρχιτεκτονικές IoT, εφαρμογές ΙοΤ, αντιδιαστολή με τον ιστό των αντικειμένων (Web of Things / WoT), προκλήσεις του IoT όπως προτυποποίηση, κλιμάκωση, μέγεθος συσκευών, κατανάλωση ενέργειας, διευθυνσιοδότηση, ασφάλεια/ιδιωτικότητα, ποιότητας υπηρεσιών, κινητικότητα κ.α
+
+
+
+### Articles-and-Papers
+
+
+ [Networked objects and smart devices](https://www.theinternetofthings.eu/sites/default/files/Rob%20van%20Kranenburg/networked_objects.pdf)
+
+ [Privacy of the Internet of Things](https://arxiv.org/pdf/1611.03340.pdf)
+
+
+> caminante, no hay camino,
+> se hace camino al andar. 
+>  
+> wanderer, there is no path,
+> the path is made by walking.
+> 
+> -- <cite>Antonio Machado: "Campos de Castilla"</cite>
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diff --git a/IoT/Intro-Arduino.adoc b/IoT/Intro-Arduino.adoc
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+= Εισαγωγή στο Διαδίκτυο των Αντικειμένων !
+Apostolos rootApostolos@swarmlab.io
+// Metadata:
+:description: IoT  Arduino Uno
+:keywords: iot, swarm, Arduino
+:data-uri:
+:toc: right
+:toc-title: Πίνακας περιεχομένων
+:toclevels: 4
+:source-highlighter: highlight
+:icons: font
+:sectnums: 
+
+{empty} +
+
+Το Arduino είναι ένας μικροελεγκτής μονής πλακέτας, δηλαδή μια απλή μητρική πλακέτα ανοικτού κώδικα με ενσωματωμένο μικροελεγκτή και εισόδους/εξόδους, η οποία μπορεί να προγραμματιστεί με τη γλώσσα Wiring (ουσιαστικά πρόκειται για τη γλώσσα προγραμματισμού C++ και ένα σύνολο από βιβλιοθήκες, υλοποιημένες επίσης στην C++ ). Το Arduino μπορεί να χρησιμοποιηθεί για την ανάπτυξη ανεξάρτητων διαδραστικών αντικειμένων αλλά και να συνδεθεί με υπολογιστή μέσω προγραμμάτων σε Processing, Max/MSP, Pure Data, SuperCollider. Οι περισσότερες εκδόσεις του Arduino μπορούν να αγοραστούν προ-συναρμολογημένες· το διάγραμμα και πληροφορίες για το υλικό είναι ελεύθερα διαθέσιμα για αυτούς που θέλουν να συναρμολογήσουν το Arduino μόνοι τους. 
+
+
+Wikipedia(EL) +  
+https://el.wikipedia.org/wiki/Arduino[^]
+
+Wikipedia(EN) +  
+https://en.wikipedia.org/wiki/Arduino[^]
+
+[[cheat-HowTo]]
+== How to use Arduino Board
+
+The 14 digital input/output pins can be used as input or output pins by using pinMode(), digitalRead() and digitalWrite() functions in arduino programming. Each pin operate at 5V and can provide or receive a maximum of 40mA current, and has an internal pull-up resistor of 20-50 KOhms which are disconnected by default.  Out of these 14 pins, some pins have specific functions as listed below:
+
+    - Serial Pins 0 (Rx) and 1 (Tx): Rx and Tx pins are used to receive and transmit TTL serial data. They are connected with the corresponding ATmega328P USB to TTL serial chip.
+    - External Interrupt Pins 2 and 3: These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value.
+    - PWM Pins 3, 5, 6, 9 and 11: These pins provide an 8-bit PWM output by using analogWrite() function.
+    - SPI Pins 10 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK): These pins are used for SPI communication.
+    - In-built LED Pin 13: This pin is connected with an built-in LED, when pin 13 is HIGH – LED is on and when pin 13 is LOW, its off.
+
+Along with 14 Digital pins, there are 6 analog input pins, each of which provide 10 bits of resolution, i.e. 1024 different values. They measure from 0 to 5 volts but this limit can be increased by using AREF pin with analog Reference() function.  
+
+    Analog pin 4 (SDA) and pin 5 (SCA) also used for TWI communication using Wire library.
+
+Arduino Uno has a couple of other pins as explained below:
+
+    - AREF: Used to provide reference voltage for analog inputs with analogReference() function.
+    - Reset Pin: Making this pin LOW, resets the microcontroller.
+
+== Install the Arduino Software (IDE) on Linux
+
+=== Download the Arduino Software (IDE)
+
+==== Installing via a tarball
+
+Get the latest version from the download page https://www.arduino.cc/en/Main/Software[^]. You can choose between the 32, 64 and ARM versions. + 
+It is very important that you choose the right version for your Linux distro. 
+Clicking on the chosen version brings you to the donation page and then you can either open or save the file. Please save it on your computer. 
+
+
+TIP: We can download the latest version of the Arduino IDE from the Arduino website (here) as a tarball. A tarball is a type of compressed folder, like a .zip file, commonly used to distrubute software in Linux; its file extension is usually .tar.xz (or .tar.gz, if it uses Z compression. We'll get to this later).
+
+WARNING: **Installing via apt**
+While there is a package for the Arduino IDE on current APT repositories, it has not been updated for a while.
+As such, while it is still possible to install the IDE by running sudo apt install arduino, it is not recommended to do so, as asking for support when using outdated software is more difficult.
+
+
+In order to extract the files we need from the tarball, we can open a terminal, cd to where the downloaded tarball is, then run
+
+```
+tar -xvf FILENAME
+```
+
+where FILENAME is the name of the download (typically arduino-(version number)-linux64.tar.xz).
+
+The command can be read as
+
+    * e**X**tract from an archive...
+    * **V**erbosely (meaning it prints the name of every file it finds)...
+    * from a **f**ile given by FILENAME.
+
+When the command finishes, run ls again; tar should have created a new folder named arduino-(version number).
+
+cd into the folder; there will be a file named install.sh in the folder. To install the IDE, execute install.sh with
+
+```
+./install.sh
+```
+
+If the script executes correctly and outputs done! at the end of its output, the IDE was installed correctly! Let's try to launch it in the next step.
+
+=== First Launch
+
+Before launching the IDE, connect your Arduino board to your computer with a USB cable.
+
+==== Permissions checker
+
+The first time we launch Arduino, a window will pop up asking to add us to the dialout group:
+
+
+image:./1fbbfedb89a5133d.png[alt="IDE.",width=250,height=250]
+
+
+==== Permissions
+
+We can look at the Arduino device by running
+
+```
+ls -l /dev/ttyACM*
+```
+
+in a terminal. The output looks mostly like this:
+
+```
+crw-rw---- 1 root dialout 166, 0 Des 14 09:47 /dev/ttyACM0
+```
+
+The ‘0' at the end of ‘ACM' might be different, and multiple entries might be listed, but the parts we need to focus on are the string of letters and dashes in front, and the two names root and dialout.
+
+The first name root is the owner of the device, and dialout is the owner group of the device.
+
+The letters and dashes in front, starting after ‘c', represent the permissions for the device by user:
+
+    * The first triplet rw- mean that the owner (root) can read and write to this device
+    * The second triplet rw- mean that members of the owner group (dialout) can read and write to this device
+    * The third triplet --- means that other users have no permissions at all (meaning that nobody else can read and write to the device)
+
+In short, nobody except root and members of dialout can do anything with the Arduino; since we aren't running the IDE as root or as a member of dialout, the IDE can't access the Arduino due to insufficient permissions.
+
+
+After you log back in the Arduino IDE, the Serial Port option should be available; change that, and we should be able to upload code to the Arduino.
+
+
+image:./6061b4c693302b28.png[alt="Port.",width=250,height=250]
+
+==== Coding
+
+Congratulations, you made it!
+
+You've just installed the Arduino IDE on your computer; you've also learned how permissions and groups work in Linux!
+
+
+== Programming Arduino
+
+Once arduino IDE is installed on the computer, connect the board with computer using USB cable. Now open the arduino IDE and choose the correct board by selecting Tools>Boards>Arduino/Genuino Uno, and choose the correct Port by selecting Tools>Port. Arduino Uno is programmed using Arduino programming language based on Wiring. To get it started with Arduino Uno board and blink the built-in LED, load the example code by selecting Files>Examples>Basics>Blink. Once the example code (also shown below) is loaded into your IDE, click on the ‘upload’ button given on the top bar. Once the upload is finished, you should see the Arduino’s built-in LED blinking.  Below is the example code for blinking:
+
+```
+// the setup function runs once when you press reset or power the board
+void setup() {
+  // initialize digital pin LED_BUILTIN as an output.
+  pinMode(LED_BUILTIN, OUTPUT);
+}
+
+// the loop function runs over and over again forever
+void loop() {
+  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
+  delay(1000);                       // wait for a second
+  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
+  delay(1000);                       // wait for a second
+```
+
+
+== Pin Description
+
+.Pin Description
+[options="header,footer"]
+|=======================
+|Pin Category|Pin Name|Details
+|Power|Vin, 3.3V, 5V, GND|
+* Vin: Input voltage to Arduino when using an external power source. 
+* 5V: Regulated power supply used to power microcontroller and other components on the board.
+* 3.3V: 3.3V supply generated by on-board voltage regulator. Maximum current draw is 50mA.
+* GND: ground pins.
+|Reset|Reset|
+			Resets the microcontroller.
+| Analog Pins|A0 – A5|Used to provide analog input in the range of 0-5V
+|Input/Output Pins|Digital Pins 0 - 13|Can be used as input or output pins.
+|Serial|0(Rx), 1(Tx)|Used to receive and transmit TTL serial data.
+|External Interrupts|2, 3|To trigger an interrupt.
+|PWM|3, 5, 6, 9, 11|Provides 8-bit PWM output.
+|SPI|10 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK)|Used for SPI communication.
+|Inbuilt LED|13|To turn on the inbuilt LED.
+|TWI|A4 (SDA), A5 (SCA)|Used for TWI communication.
+|AREF|AREF|To provide reference voltage for input voltage.
+|=======================
+
+== Arduino
+
+image:./Arduino_KY-012_Keyes_Active_buzzer_module_connection_diagram.png[alt="Arduino.",width=250,height=250]
+
+
+
+
+
+
+:hardbreaks:
+
+{empty} +
+{empty} +
+{empty} 
+
+:!hardbreaks:
+
+'''
+
+.Reminder
+[NOTE]
+====
+:hardbreaks:
+Caminante, no hay camino, 
+se hace camino al andar.
+
+Wanderer, there is no path, 
+the path is made by walking.
+
+*Antonio Machado* Campos de Castilla
+====
diff --git a/IoT/Intro-IoT.adoc b/IoT/Intro-IoT.adoc
new file mode 100644
index 0000000..52dc26d
--- /dev/null
+++ b/IoT/Intro-IoT.adoc
@@ -0,0 +1,242 @@
+= Εισαγωγή στο Διαδίκτυο των Αντικειμένων !
+Apostolos rootApostolos@swarmlab.io
+// Metadata:
+:description: IoT  Εισαγωγή στο Διαδίκτυο των Αντικειμένων
+:keywords: iot, swarm
+:data-uri:
+:toc: right
+:toc-title: Πίνακας περιεχομένων
+:toclevels: 4
+:source-highlighter: highlight
+:icons: font
+:sectnums: 
+
+{empty} +
+
+
+Ορισμός, βασικά χαρακτηριστικά και αρχιτεκτονικές IoT, εφαρμογές ΙοΤ, αντιδιαστολή με τον ιστό των αντικειμένων (Web of Things / WoT), προκλήσεις του IoT όπως προτυποποίηση, κλιμάκωση, μέγεθος συσκευών, κατανάλωση ενέργειας, διευθυνσιοδότηση, ασφάλεια/ιδιωτικότητα, ποιότητας υπηρεσιών, κινητικότητα κ.α
+
+Δομή και τεχνολογία κόμβων. Αρχιτεκτονική και τοπολογίες. Πρότυπα και πρωτόκολλα φυσικού επιπέδου. Θέματα διανομής, επικοινωνίας και οργάνωσης. Πρωτόκολλα δρομολόγησης. Ενεργειακά αποδοτικοί αλγόριθμοι συλλογής και επεξεργασίας δεδομένων.
+
+Μελέτη εφαρμόγων στους τομείς της υγείας, έξυπνα σπίτια και πόλεις, γεωργία ακριβείας, μεταφορές, βιομηχανικές εφαρμογές κ.α. Ενδεικτικά παραδείγματα σχεδίασης εφαρμογών (case studies).
+
+[[cheat-Articles]]
+== Articles-and-Papers
+
+- Networked objects and smart devices +  
+https://www.theinternetofthings.eu/sites/default/files/Rob%20van%20Kranenburg/networked_objects.pdf[^]
+
+- Privacy of the Internet of Things + 
+https://arxiv.org/pdf/1611.03340.pdf[^]
+
+[[cheat-Links]]
+== Links-and-Apps
+
+=== IoT
+
+* IoT - Explained in less than 3 minutes
++
+video::GIfWNtMfYvk[youtube]
+
+* Internet of Things explained simply
++
+video::uEsKZGOxNKw[youtube]
+
+* How It Works: Internet of Things
++
+video::QSIPNhOiMoE[youtube]
+
+
+=== Network
+
+* Network Topologies (Star, Bus, Ring, Mesh, Ad hoc, Infrastructure, & Wireless Mesh Topology)
++
+video::zbqrNg4C98U[youtube]
+
+* Mesh Routing
++
+video::Kjrib-BflHw[youtube]
+
+
+* How a DNS Server (Domain Name System) works.
++
+video::mpQZVYPuDGU[youtube]
+
+=== Apps
+
+==== Smart City
+
+* Connected Vehicle: The Future of Transportation
++
+video::Q8Cn47L8FRQ[youtube]
+
+* Communication protocols for Vehicular Ad hoc NETworks (VENG)
++
+video::14fOqMBn9aw[youtube]
+
+*  Solution to Traffic
++
+video::iHzzSao6ypE[youtube]
+
+==== Exoskeleton
+
+* Exoskeleton 
++
+video::qTxxwLWsMoA[youtube]
+
+==== Military
+
+*  Military Robots
++
+video::JGNopwFcz3A[youtube]
+
+==== Sports
+
+*  3D Tracking with IMU
++
+video::6ijArKE8vKU[youtube]
+
+*  Usain Bolt
++
+https://www.facebook.com/Eurosport/videos/10156447549454745[^]
+
+*  Wearable Sports Tech for Future Champions
++
+video::dIyhUE1Jt9s[youtube]
+
+*  The Duel (Now)
++
+video::ive4sKkpCqs[youtube]
+
+*  The Duel in the near future
++
+video::tIIJME8-au8[youtube]
+
+=== Misc
+
+* Why Industrial IoT..?
++
+video::S352lyPZP00[youtube]
+
+
+=== DiY
+
+* Motion Tracking Using IMUa - I
++
+video::6QJ_3lJSh8w[youtube]
+
+
+* Motion Tracking Using IMU - II
++
+video::JzMaCKzWyiY[youtube]
+
+
+[[cheat-Swarm]]
+== Swarm
+
+=== The Five Principles of Swarm Intelligence
+
+
+able self-assembly in a thousand-robot swarm-xK54Bu9HFRw.mkvmage:./Image3_650.jpg[alt="Traffic jams"]
+image:./swarm.jpeg[alt="Swarm Intelligence"]
+
+- Awareness
+
+Each member must be aware of its surroundings and abilities.
+
+- Autonomy
+
+Each member must operate as an autonomous master (not as a slave;) this is essential to self-coordinate allocation of labor.
+
+- Solidarity
+
+Each member must cooperate in solidarity: when a task is completed, each member should autonomously look for a new task (leveraging its current position.)
+
+- Expandability
+
+The system must permit expansion where members are dynamically aggregated.
+
+- Resiliency
+
+The system must be self-healing: when members are removed, the remaining members should undertake the unfinished tasks.
+
+=== The Five Principles of Swarm Intelligence (Video)
+
+* Five Principles of Swarm Intelligence
++
+video::axxXz2BM0yw[youtube]
+
+=== Swarm Apps
+
+==== Harvard Universityi (thousand tiny robots)
+
+Harvard University scientists have developed about a thousand tiny robots that, like swarming bees or army ants, can work together in vast numbers without a guiding central intelligence
+
+* Programmable self-assembly in a thousand-robot swarm
++
+video::xK54Bu9HFRw[youtube]
+
+More Info: 
+https://www.seas.harvard.edu/news/2014/08/self-organizing-thousand-robot-swarm[^]
+
+
+==== Intel's Shooting Star Drone
+
+The Shooting Star system is designed for light shows, so it will initially be used for entertainment, such as shows as theme parks, sports stadiums, and large public events (Fourth of July, New Year's Eve, etc.). The show is a bit like battery-powered fireworks, but with Intel's brains behind the operation, fancy animation can be created in just a few days.
+
+Each quadcopter weighs just over half a pound, with built-in LED lights that can create more than 4 billion color combinations. The system's algorithms determine where drones should be placed and optimize the flight path. An entire fleet of hundreds of drones can be controlled by a single computer.
+
+
+* Programmable swarm light show
++
+video::aOd4-T_p5fA[youtube]
+
+More Info: 
+https://www.zdnet.com/article/500-intel-drones-dance-in-the-night-sky/[^]
+
+
+
+=== Swarm intelligence approaches
+
+* Intel's Shooting Star Drone
+Each member is controlled through a central computer
+
+* Harvard University
+Each member behaves autonomously without a central computer
+
+Both approaches have merits and limitations.
+
+In the case of “a” above, members are slaves in a system controlled by a central computer with sufficient channels of communication. The results can be visually spectacular, as illustrated by Intel’s drones. However, since a central computer dictates the movement of each member, there is limited flexibility to adapt to changing environments
+
+TIP: vulnerability due to single point of failure
+
+
+In the case of "b"
+
+image:./Image3_650.jpg[alt="Traffic jams"] + 
+In a swarm of a thousand simple robots, errors like traffic jams (second from left) and imprecise positioning (far right) are common. (Photo courtesy of Mike Rubenstein and Science/AAAS.)
+
+
+
+:hardbreaks:
+
+{empty} +
+{empty} +
+{empty} 
+
+:!hardbreaks:
+
+'''
+
+.Reminder
+[NOTE]
+====
+:hardbreaks:
+Caminante, no hay camino, 
+se hace camino al andar.
+
+Wanderer, there is no path, 
+the path is made by walking.
+
+*Antonio Machado* Campos de Castilla
+====
diff --git a/IoT/LICENSE b/IoT/LICENSE
new file mode 100644
index 0000000..82b5650
--- /dev/null
+++ b/IoT/LICENSE
@@ -0,0 +1,614 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http s ://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license
+document, but changing it is not allowed.
+
+Preamble
+
+The GNU Affero General Public License is a free, copyleft license for software
+and other kinds of works, specifically designed to ensure cooperation with
+the community in the case of network server software.
+
+The licenses for most software and other practical works are designed to take
+away your freedom to share and change the works. By contrast, our General
+Public Licenses are intended to guarantee your freedom to share and change
+all versions of a program--to make sure it remains free software for all its
+users.
+
+When we speak of free software, we are referring to freedom, not price. Our
+General Public Licenses are designed to make sure that you have the freedom
+to distribute copies of free software (and charge for them if you wish), that
+you receive source code or can get it if you want it, that you can change
+the software or use pieces of it in new free programs, and that you know you
+can do these things.
+
+Developers that use our General Public Licenses protect your rights with two
+steps: (1) assert copyright on the software, and (2) offer you this License
+which gives you legal permission to copy, distribute and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that improvements made
+in alternate versions of the program, if they receive widespread use, become
+available for other developers to incorporate. Many developers of free software
+are heartened and encouraged by the resulting cooperation. However, in the
+case of software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and letting
+the public access it on a server without ever releasing its source code to
+the public.
+
+The GNU Affero General Public License is designed specifically to ensure that,
+in such cases, the modified source code becomes available to the community.
+It requires the operator of a network server to provide the source code of
+the modified version running there to the users of that server. Therefore,
+public use of a modified version, on a publicly accessible server, gives the
+public access to the source code of the modified version.
+
+An older license, called the Affero General Public License and published by
+Affero, was designed to accomplish similar goals. This is a different license,
+not a version of the Affero GPL, but Affero has released a new version of
+the Affero GPL which permits relicensing under this license.
+
+The precise terms and conditions for copying, distribution and modification
+follow.
+
+TERMS AND CONDITIONS
+
+   0. Definitions.
+
+   "This License" refers to version 3 of the GNU Affero General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds of works,
+such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this License.
+Each licensee is addressed as "you". "Licensees" and "recipients" may be individuals
+or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work in
+a fashion requiring copyright permission, other than the making of an exact
+copy. The resulting work is called a "modified version" of the earlier work
+or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based on the
+Program.
+
+To "propagate" a work means to do anything with it that, without permission,
+would make you directly or secondarily liable for infringement under applicable
+copyright law, except executing it on a computer or modifying a private copy.
+Propagation includes copying, distribution (with or without modification),
+making available to the public, and in some countries other activities as
+well.
+
+To "convey" a work means any kind of propagation that enables other parties
+to make or receive copies. Mere interaction with a user through a computer
+network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays "Appropriate Legal Notices" to the
+extent that it includes a convenient and prominently visible feature that
+(1) displays an appropriate copyright notice, and (2) tells the user that
+there is no warranty for the work (except to the extent that warranties are
+provided), that licensees may convey the work under this License, and how
+to view a copy of this License. If the interface presents a list of user commands
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diff --git a/IoT/README.md b/IoT/README.md
new file mode 100755
index 0000000..0bf01de
--- /dev/null
+++ b/IoT/README.md
@@ -0,0 +1,36 @@
+# IOT Lab
+
+### Articles-and-Papers
+
+
+ [installDocker](https://www.theinternetofthings.eu/sites/default/files/Rob%20van%20Kranenburg/networked_objects.pdf)
+
+### Installation
+
+##### 1. Install docker
+
+see [installDocker](/Howtos/installDocker.md)
+
+
+##### 2. Download files
+
+ [file1](/files/mysec-lite-commands.tar.gz)
+ [file2](/files/mysec-lite.xaa)
+ [file3](/files/mysec-lite.xab)
+
+##### 3. Load  It
+
+```sh
+$ bash ./install-exercise_tcp_attack.sh
+```
+
+##### 3. Run  It
+
+```sh
+$ ./lab-load-exercise_tcp_attack   	    # Load Lab Environment. Required only once per Session
+$ ./lab-run-tcpattack-attacker		    # Console4Attacker				
+$ ./lab-run-tcpattack-client		    # Console4Client
+$ ./lab-run-tcpattack-server		    # Console4Server
+```
+
+##### Happy coding :-)
diff --git a/IoT/README1.md b/IoT/README1.md
new file mode 100644
index 0000000..bda5a2d
--- /dev/null
+++ b/IoT/README1.md
@@ -0,0 +1,203 @@
+vim-instant-markdown
+====================
+
+Want to instantly preview finicky markdown files, but don't want to leave your
+favourite editor, or have to do it in some crappy browser text area?
+**vim-instant-markdown** is your friend! When you open a markdown file in vim,
+a browser window will open which shows the compiled markdown in real-time, and
+closes once you close the file in vim.
+
+As a bonus, [github-flavored-markdown][gfm] is supported, and styles used while
+previewing are the same as those GitHub uses!
+
+[![Screenshot][ss]][ssbig]
+
+Installation
+------------
+**Quick start** (assuming you have all the necessary dependencies):
+
+- Install the mini-server by running either:
+
+  - `[sudo] npm -g install instant-markdown-d` or, for the pre-release version:
+  - `[sudo] npm -g install instant-markdown-d@next`
+
+  alternatively:
+
+  - `pip install --user smdv`
+
+  for the Python mini-server.
+
+* Add the following to your `.vimrc`, depending on the plugin manager of your
+  choice:
+
+  - [vim-plug][plug]
+
+    ```vim
+    Plug 'suan/vim-instant-markdown', {'for': 'markdown'}
+    ```
+
+  - [Vundle][vundle]
+
+    ```vim
+    Plugin 'suan/vim-instant-markdown', {'rtp': 'after'}
+    ```
+
+- Minimal default configuration:
+
+    ```vim
+    filetype plugin on
+    "Uncomment to override defaults:
+    "let g:instant_markdown_slow = 1
+    "let g:instant_markdown_autostart = 0
+    "let g:instant_markdown_open_to_the_world = 1
+    "let g:instant_markdown_allow_unsafe_content = 1
+    "let g:instant_markdown_allow_external_content = 0
+    "let g:instant_markdown_mathjax = 1
+    "let g:instant_markdown_logfile = '/tmp/instant_markdown.log'
+    "let g:instant_markdown_autoscroll = 0
+    "let g:instant_markdown_port = 8888
+    "let g:instant_markdown_python = 1
+    ```
+
+**Detailed instructions**
+
+- If you're on Linux, ensure the following packages are installed:
+  - `xdg-utils`
+  - `curl`
+  - `nodejs`
+- If you're on Windows, you will need into install [cURL][curl] and put it on your `%PATH%`.
+- If you do not use a plugin manager, copy the
+  [`after/ftplugin/markdown/instant-markdown.vim`](after/ftplugin/markdown/instant-markdown.vim)
+  file into `~/.vim/after/ftplugin/markdown/` (creating directories as
+  necessary),
+- Open a markdown file in vim and enjoy!
+
+Configuration
+-------------
+### g:instant_markdown_slow
+
+By default, vim-instant-markdown will update the display in realtime.  If that taxes your system too much, you can specify
+
+```vim
+let g:instant_markdown_slow = 1
+```
+
+before loading the plugin (for example place that in your `~/.vimrc`). This will cause vim-instant-markdown to only refresh on the following events:
+
+- No keys have been pressed for a while
+- A while after you leave insert mode
+- You save the file being edited
+
+### g:instant_markdown_autostart
+By default, vim-instant-markdown will automatically launch the preview window when you open a markdown file. If you want to manually control this behavior, you can specify
+
+```vim
+let g:instant_markdown_autostart = 0
+```
+
+in your .vimrc. You can always manually trigger preview via the command
+`:InstantMarkdownPreview` and stop it via `:InstantMarkdownStop`.
+
+### g:instant_markdown_open_to_the_world
+By default, the server only listens on localhost. To make the server available to others in your network, edit your .vimrc and add
+
+```vim
+let g:instant_markdown_open_to_the_world = 1
+```
+
+Only use this setting on trusted networks!
+
+### g:instant_markdown_allow_unsafe_content
+By default, scripts are blocked. To allow scripts to run, edit your .vimrc and add
+
+```vim
+let g:instant_markdown_allow_unsafe_content = 1
+```
+
+### g:instant_markdown_allow_external_content
+By default, external resources such as images, stylesheets, frames and plugins are allowed.
+To block such content, edit your .vimrc and add
+
+```vim
+let g:instant_markdown_allow_external_content = 0
+```
+
+### g:instant_markdown_logfile
+For troubleshooting, server startup and curl communication from Vim to the server can be logged into a file.
+
+```
+let g:instant_markdown_logfile = '/tmp/instant_markdown.log'
+```
+
+### g:instant_markdown_mathjax
+By default, no TeX code embedded within markdown would be rendered. This option
+uses MathJax and launches the node server as `instant-markdown-d --mathjax`.
+
+```vim
+let g:instant_markdown_mathjax = 1
+```
+
+New in version `instant-markdown-d==0.2.0`
+
+### g:instant_markdown_browser
+By default, browser is detected by `instant-markdown-d` depending on the OS.
+Starting with version `instant-markdown-d>=0.2.0`, you can set something like
+
+```vim
+let g:instant_markdown_browser = "firefox --new-window"
+```
+
+New in version `instant-markdown-d==0.2.0`
+
+### g:instant_markdown_port
+Choose a custom port instead of the default `8090`.
+
+```vim
+let g:instant_markdown_port = 8888
+```
+
+New in version `instant-markdown-d==0.2.0`
+
+### g:instant_markdown_autoscroll
+By default, with version `instant-markdown-d>=0.2.0`, the live preview
+auto-scrolls to where your cursor is positioned.  To disable this behaviour,
+edit your .vimrc and add
+
+```vim
+let g:instant_markdown_autoscroll = 0
+```
+
+New in version `instant-markdown-d==0.2.0`
+
+Supported Platforms
+-------------------
+OSX, Unix/Linuxes*, and Windows**.
+
+<sub>*: One annoyance in Linux is that there's no way to reliably open a browser page in the background, so you'll likely have to manually refocus your vim session everytime you open a Markdown file. If you have ideas on how to address this I'd love to know!</sub>
+
+<sub>**: In Windows, there's no easy way to execute commands asynchronously without popping up a cmd.exe window. Thus, if you run this plugin without `g:instant_markdown_slow`, you might experience performance issues.</sub>
+
+FAQ
+---
+> It's not working!
+
+- Make sure `instant-markdown-d` was installed as a global module (e.g. using `npm -g install`)
+- If you're on OSX and are using zsh, try to add `set shell=bash\ -i` in your `.vimrc` to set interactive bash as the default vim shell. (See [this issue](http://github.com/suan/vim-instant-markdown/issues/41))
+
+> Why don't my `<bla>.md` files trigger this plugin?
+
+By default, vim versions before 7.4.480 only recognize files ending with `.markdown`, `.mdown`, and `README.md` as markdown files. If you want `<anything>.md` to be recognized, I recommend installing one of many markdown plugins available, such as [this one][tpope-markdown].
+
+_If you're curious, the code for the mini-server component for this plugin can
+be found at http://github.com/suan/instant-markdown-d. A plugin can easily be
+written for any editor to interface with the server to get the same
+functionality found here._
+
+
+[ss]: https://i.imgur.com/r7G6FNA.gif "Click for bigger preview"
+[ssbig]: https://i.imgur.com/4Fty7pw.gif
+[gfm]: http://github.github.com/github-flavored-markdown/
+[curl]: http://curl.haxx.se/download.html
+[tpope-markdown]: https://github.com/tpope/vim-markdown
+[plug]: https://github.com/junegunn/vim-plug
+[vundle]: https://github.com/gmarik/Vundle.vim
diff --git a/IoT/swarm.jpeg b/IoT/swarm.jpeg
new file mode 100644
index 0000000..1caf439
Binary files /dev/null and b/IoT/swarm.jpeg differ
diff --git a/IoT/test.adoc b/IoT/test.adoc
new file mode 100644
index 0000000..d1740eb
--- /dev/null
+++ b/IoT/test.adoc
@@ -0,0 +1,110 @@
+Welcome to AsciiDocLIVE!
+------------------------
+
+AsciiDocLIVE is a *free online http://www.methods.co.nz/asciidoc/[AsciiDoc^]
+editor*.
+
+* Just type AsciiDoc source text into the *left* pane,
+* ...and the live preview appears in the *right* pane!
+
+What's AsciiDoc?
+~~~~~~~~~~~~~~~~~
+
+Hello World
+
+AsciiDoc is a human-readable text document format for writing notes,
+documentation, articles, books, ebooks, slideshows, web pages, man pages and
+blogs, and more. AsciiDoc files can be translated to many formats including
+HTML, PDF, EPUB, and man page.
+
+To learn more, visit the AsciiDoc home page at
+http://www.methods.co.nz/asciidoc/[^].
+
+About AsciiDocLIVE
+~~~~~~~~~~~~~~~~~~
+AsciiDocLIVE is currently in *beta* stage. This means there are likely a _lot_
+of bugs, and even more ways to make it better.
+
+If you have any questions, suggestions or other feedback, please
+feel free to
+https://github.com/jichu4n/asciidoclive/issues/new[create an issue on pass:[<i class="fa fa-github"></i>] GitHub^].
+Hope
+to hear from you soon!
+
+
+[[cheat-sheet]]
+AsciiDoc Mini Cheat Sheet
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To help you get started, here're some snippets from the
+http://powerman.name/doc/asciidoc[AsciiDoc Cheet Sheet^]. Feel free to poke
+around :)
+
+Text Styles
+^^^^^^^^^^^
+* normal, _italic_, *bold*, +mono+.
+* ``double quoted'', `single quoted'.
+* normal, ^super^, ~sub~.
+* `passthru *bold*`
+
+Tables
+^^^^^^
+.An example table
+[options="header,footer"]
+|=======================
+|Col 1|Col 2      |Col 3
+|1    |Item 1     |a
+|2    |Item 2     |b
+|3    |Item 3     |c
+|6    |Three items|d
+|=======================
+
+Lists
+^^^^^
+
+* Q: How did the programmer die in the shower?
+  A: He read the shampoo instructions:
+
+  . Lather, rinse.
+  . Repeat.
+
+* There are only 10 kinds of people in this world:
+  - Those who understand binary.
+  - Those who don't.
+
+Misc
+^^^^
+
+* Code listings:
++
+[source,python]
+-----------------
+#!/usr/bin/env python
+import antigravity
+try:
+  antigravity.fly()
+except FlytimeError as e:
+  # um...not sure what to do now.
+  pass
+-----------------
+
+* Quotes:
++
+[quote,"Charles Dickens","A Tale of Two Cities"]
+It was the best of times, it was the worst of times, it was the age of wisdom,
+it was the age of foolishness...
+
+* Links:
+** http://asciidoclive.com/[AsciiDocLIVE^] is awesome!
+
+* Images:
++
+image:./test.jpg[alt="not bad.",width=128,height=128]
+
+* Videos:
++
+video::th_H1gixMEE[youtube]
+
+* Pass-through: pass:[<div align="center"><b>pass through content</b></div>]
+
+
diff --git a/IoT/test.jpg b/IoT/test.jpg
new file mode 100644
index 0000000..bcd5aaa
Binary files /dev/null and b/IoT/test.jpg differ
diff --git a/misc/header.adoc b/misc/header.adoc
new file mode 100644
index 0000000..6caffd1
--- /dev/null
+++ b/misc/header.adoc
@@ -0,0 +1,5 @@
+[options="header"]
+|=======================
+|http://docs.swarmlab.io[Home] icon:home[link="http://docs.swarmlab.io", window="_self"]|http://docs.swarmlab.io/Howtos[HowTos] icon:wpbeginner[link="http://docs.swarmlab.io/Howtos", window="_self"]|http://docs.swarmlab.io/lab[Labs] icon:mixcloud[link="http://docs.swarmlab.io/lab", window="_self"]
+|=======================
+[.right.text-center]
diff --git a/mpi/LICENSE b/mpi/LICENSE
new file mode 100644
index 0000000..82b5650
--- /dev/null
+++ b/mpi/LICENSE
@@ -0,0 +1,614 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http s ://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license
+document, but changing it is not allowed.
+
+Preamble
+
+The GNU Affero General Public License is a free, copyleft license for software
+and other kinds of works, specifically designed to ensure cooperation with
+the community in the case of network server software.
+
+The licenses for most software and other practical works are designed to take
+away your freedom to share and change the works. By contrast, our General
+Public Licenses are intended to guarantee your freedom to share and change
+all versions of a program--to make sure it remains free software for all its
+users.
+
+When we speak of free software, we are referring to freedom, not price. Our
+General Public Licenses are designed to make sure that you have the freedom
+to distribute copies of free software (and charge for them if you wish), that
+you receive source code or can get it if you want it, that you can change
+the software or use pieces of it in new free programs, and that you know you
+can do these things.
+
+Developers that use our General Public Licenses protect your rights with two
+steps: (1) assert copyright on the software, and (2) offer you this License
+which gives you legal permission to copy, distribute and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that improvements made
+in alternate versions of the program, if they receive widespread use, become
+available for other developers to incorporate. Many developers of free software
+are heartened and encouraged by the resulting cooperation. However, in the
+case of software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and letting
+the public access it on a server without ever releasing its source code to
+the public.
+
+The GNU Affero General Public License is designed specifically to ensure that,
+in such cases, the modified source code becomes available to the community.
+It requires the operator of a network server to provide the source code of
+the modified version running there to the users of that server. Therefore,
+public use of a modified version, on a publicly accessible server, gives the
+public access to the source code of the modified version.
+
+An older license, called the Affero General Public License and published by
+Affero, was designed to accomplish similar goals. This is a different license,
+not a version of the Affero GPL, but Affero has released a new version of
+the Affero GPL which permits relicensing under this license.
+
+The precise terms and conditions for copying, distribution and modification
+follow.
+
+TERMS AND CONDITIONS
+
+   0. Definitions.
+
+   "This License" refers to version 3 of the GNU Affero General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds of works,
+such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this License.
+Each licensee is addressed as "you". "Licensees" and "recipients" may be individuals
+or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work in
+a fashion requiring copyright permission, other than the making of an exact
+copy. The resulting work is called a "modified version" of the earlier work
+or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based on the
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+
+To "propagate" a work means to do anything with it that, without permission,
+would make you directly or secondarily liable for infringement under applicable
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+Propagation includes copying, distribution (with or without modification),
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+To "convey" a work means any kind of propagation that enables other parties
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+An interactive user interface displays "Appropriate Legal Notices" to the
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+(1) displays an appropriate copyright notice, and (2) tells the user that
+there is no warranty for the work (except to the extent that warranties are
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diff --git a/mpi/README.md b/mpi/README.md
new file mode 100644
index 0000000..5182f96
--- /dev/null
+++ b/mpi/README.md
@@ -0,0 +1,2 @@
+# mpi
+
diff --git a/mpi/c5b77c78-9ee3-11e6-8068-20e37f5e8655.png b/mpi/c5b77c78-9ee3-11e6-8068-20e37f5e8655.png
new file mode 100644
index 0000000..7cb4ede
Binary files /dev/null and b/mpi/c5b77c78-9ee3-11e6-8068-20e37f5e8655.png differ
diff --git a/mpi/mpi.adoc b/mpi/mpi.adoc
new file mode 100644
index 0000000..e1bc98a
--- /dev/null
+++ b/mpi/mpi.adoc
@@ -0,0 +1,169 @@
+= mpi !
+Apostolos rootApostolos@swarmlab.io
+// Metadata:
+:description: Intro and Install
+:keywords: mpi
+:data-uri:
+:toc: right
+:toc-title: Πίνακας περιεχομένων
+:toclevels: 4
+:source-highlighter: highlight
+:icons: font
+:sectnums: 
+
+{empty} +
+
+
+[[cheat-Docker]]
+== Install swarmlab-mpi (Home PC)
+
+- Install docker + 
+http://docs.swarmlab.io/Howtos/docker/install.adoc.html[^]
+
+- Clone repo https://git.swarmlab.io:3000/swarmlab/swarmlab-mpi + 
+HowTo: See http://docs.swarmlab.io/Howtos/git/use-git.adoc.html 
+
+.INSTALL
+[NOTE]
+====
+See INSTALL.md for Installation Instruction
+====
+
+
+
+.lab
+[NOTE]
+====
+In Lab's everything is ready!
+Goto  "create"
+====
+
+[[cheat-swarmlab-mpi]]
+== Usage  (swarmlab-mpi)
+
+
+- Open a console
+
+- Create a directory
+
+```
+cd dir
+swarmlab-mpi <tab><tab>
+
+create       create project      (swarmlab-mpi create)
+up           start swarmlab-mpi  (swarmlab-mpi up size=10)
+scale        resize swarmlab-mpi (swarmlab-mpi scale size=30)
+reload       rebuild image       (swarmlab-mpi reload size=15)
+login        login swarmlab-mpi  (swarmlab-mpi login)
+exec         execute command     (swarmlab-mpi exec [SHELL COMMAND])
+down         stop swarmlab-mpi   (swarmlab-mpi down)
+clean        clean project       (swarmlab-mpi clean)
+list         show instances      (swarmlab-mpi swarmlab-mpi list)
+help         show help           (swarmlab-mpi help)
+```
+
+[NOTE]
+====
+Using the tab key to automatically complete unambiguous commands and paths in Bash
+====
+
+
+[[cheat-swarmlab-create]]
+== Create swarmlab project
+
+```
+mkdir myproject
+cd myproject
+swarmlab-mpi create
+```
+.Relevant files:
+```
+Project
+├── Dockerfile          # Image specification
+├── project             # Sample program source code
+│   └── mpi_hello_world.c
+├── ssh                 # keys for accessing
+│   ├── id_rsa          # (could generate your own)
+│   └── id_rsa.pub
+├── docker-compose.yml  # Container orchestration 
+```
+
+[[cheat-swarmlab-up]]
+== Spin up the swarmlab cluster
+
+```
+cd myproject
+swarmlab-mpi up size=5
+```
+
+.We built a high-performing, scalable infrastructure
+image:./swarmlab-network.png[alt="Swarmlab"] +
+
+
+
+
+[[cheat-swarmlab-up1]]
+== Login to the swarmlab cluster
+
+```
+cd myproject
+swarmlab-mpi login
+```
+
+[[cheat-swarmlab-complile]]
+==  Compile and Run the sample  program.
+
+```
+mpicc -o mpi_hello_world ./mpi_hello_world.c
+mpirun ./mpi_hello_world
+```
+
+.New files
+[NOTE]
+====
+copy or create files into the project directory. Compile and Run!
+====
+
+
+
+[[cheat-swarmlab-scale]]
+== Scale cluster in real-time
+
+As the cluster running, without having to close the session, open a different terminal and go back to the project directory.
+
+```
+cd myproject
+swarmlab-mpi scale size=10
+```
+
+[[cheat-swarmlab-down]]
+== shutdown swarmlab-mpi cluster
+
+
+```
+cd myproject
+swarmlab-mpi down
+```
+
+:hardbreaks:
+
+{empty} +
+{empty} +
+{empty} 
+
+:!hardbreaks:
+
+'''
+
+.Reminder
+[NOTE]
+====
+:hardbreaks:
+Caminante, no hay camino, 
+se hace camino al andar.
+
+Wanderer, there is no path, 
+the path is made by walking.
+
+*Antonio Machado* Campos de Castilla
+====
diff --git a/mpi/swarmlab-network.png b/mpi/swarmlab-network.png
new file mode 100644
index 0000000..7691a11
Binary files /dev/null and b/mpi/swarmlab-network.png differ
diff --git a/sec/LICENSE b/sec/LICENSE
new file mode 100644
index 0000000..82b5650
--- /dev/null
+++ b/sec/LICENSE
@@ -0,0 +1,614 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
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diff --git a/sec/README.md b/sec/README.md
new file mode 100644
index 0000000..aeb3b02
--- /dev/null
+++ b/sec/README.md
@@ -0,0 +1,2 @@
+# sec
+
diff --git a/sec/ex-1_iptables.adoc b/sec/ex-1_iptables.adoc
new file mode 100644
index 0000000..e5b4f0f
--- /dev/null
+++ b/sec/ex-1_iptables.adoc
@@ -0,0 +1,375 @@
+= Scan and network statistics !
+Apostolos rootApostolos@swarmlab.io
+// Metadata:
+:description: Intro and Install
+:keywords: sec, iptables
+:data-uri:
+:toc: right
+:toc-title: Πίνακας περιεχομένων
+:toclevels: 4
+:source-highlighter: highlight
+:icons: font
+:sectnums: 
+
+{empty} +
+
+
+[[cheat-Docker]]
+== Install swarmlab-sec (Home PC)
+
+HowTo: See http://docs.swarmlab.io/lab/sec/sec.adoc.html
+
+
+.NOTE
+[NOTE]
+====
+Assuming you're already logged in
+====
+
+
+
+
+== Find IP
+
+[source,bash]
+----
+# ifconfig
+
+eth0:   flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
+        inet 172.21.0.2  netmask 255.255.0.0  broadcast 172.21.255.255
+        ether 02:42:ac:15:00:02  txqueuelen 0  (Ethernet)
+        RX packets 61  bytes 9309 (9.3 KB)
+        RX errors 0  dropped 0  overruns 0  frame 0
+        TX packets 0  bytes 0 (0.0 B)
+        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
+
+lo:     flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
+        inet 127.0.0.1  netmask 255.0.0.0
+        loop  txqueuelen 1000  (Local Loopback)
+        RX packets 248  bytes 14260 (14.2 KB)
+        RX errors 0  dropped 0  overruns 0  frame 0
+        TX packets 248  bytes 14260 (14.2 KB)
+        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
+---- 
+
+TIP: inet ***172.21.0.2***  netmask 255.255.0.0  broadcast 172.21.255.255
+
+== Find live hosts
+
+[source,bash]
+----
+nmap -sP 172.21.0.*
+
+Nmap scan report for 172.21.0.1 (172.21.0.1)
+Host is up (0.00028s latency).
+MAC Address: 02:42:56:48:D0:61 (Unknown)
+Nmap scan report for testnetwork2_worker_1.testnetwork2_net (172.21.0.3)
+Host is up (0.00015s latency).
+MAC Address: 02:42:AC:15:00:03 (Unknown)
+Nmap scan report for testnetwork2_worker_3.testnetwork2_net (172.21.0.4)
+Host is up (0.00018s latency).
+MAC Address: 02:42:AC:15:00:04 (Unknown)
+Nmap scan report for testnetwork2_worker_4.testnetwork2_net (172.21.0.5)
+Host is up (0.00015s latency).
+MAC Address: 02:42:AC:15:00:05 (Unknown)
+Nmap scan report for testnetwork2_worker_2.testnetwork2_net (172.21.0.6)
+Host is up (0.00017s latency).
+MAC Address: 02:42:AC:15:00:06 (Unknown)
+Nmap scan report for 9110d42e466b (172.21.0.2)
+
+
+nmap -sP 172.21.0.* | grep Nmap | cut -d' ' -f5-6
+
+172.21.0.1 (172.21.0.1)
+testnetwork2_worker_1.testnetwork2_net (172.21.0.3)
+testnetwork2_worker_3.testnetwork2_net (172.21.0.4)
+testnetwork2_worker_4.testnetwork2_net (172.21.0.5)
+testnetwork2_worker_2.testnetwork2_net (172.21.0.6)
+9110d42e466b (172.21.0.2)
+
+----
+
+.What is Nmap?
+[NOTE]
+====
+Nmap, short for Network Mapper, is a free, open-source tool for vulnerability scanning and network discovery. Network administrators use Nmap to identify what devices are running on their systems, discovering hosts that are available and the services they offer, finding open ports and detecting security risks.
+
+See https://en.wikipedia.org/wiki/Nmap
+====
+
+
+
+== Scan Ports
+
+=== Scan a Single Port, All Ports, or Series
+
+[source,bash]
+----
+Nmap commands can be used to scan a single port or a series of ports:
+----
+
+=== Scan port 80 on the target system:
+
+[source,bash]
+----
+nmap –p 80 172.21.0.3
+----
+
+=== Scan ports 1 through 200 on the target system:
+
+[source,bash]
+----
+nmap –p 1-200 172.21.0.3
+----
+
+=== Scan (Fast) the most common ports:
+
+[source,bash]
+----
+nmap –F 172.21.0.3
+----
+
+=== To scan all ports (1 – 65535):
+
+[source,bash]
+----
+nmap –p– 172.21.0.3
+----
+
+
+
+=== Scan All TCP UDP Ports
+
+Scan all UDP and TCP ports in a single command. We will use -sU for UDP and sT for TCP protocol.
+[source,bash]
+----
+nmap -sU -sT -p0-65535 IP
+----
+
+
+.What Are Ports?
+[NOTE]
+====
+
+On modern operating systems, ports are numbered addresses for network traffic. Different kinds of services use different ports by default.
+
+For example, normal web traffic uses Port 80, while POP3 email uses Port 110. One of the ways that a firewall works is by allowing or restricting traffic over a particular port.
+
+Because the ports into your computer can cause a security risk, it’s critical to know which ports are open and which are blocked.
+
+====
+
+== netstat
+
+=== Listing  (Almost all)
+
+[source,bash]
+----
+netstat -antlupe
+----
+
+=== Listing TCP Ports connections
+
+[source,bash]
+----
+netstat -at
+----
+
+.Netstat
+[NOTE]
+====
+Netstat command displays various network related information such as network connections, routing tables, interface statistics, masquerade connections, multicast memberships etc.,
+====
+
+
+=== Listing UDP Ports connections
+
+[source,bash]
+----
+netstat -au
+----
+
+
+=== Listing all LISTENING Connections
+
+[source,bash]
+----
+netstat -l
+----
+
+
+=== Listing all TCP Listening Ports
+
+[source,bash]
+----
+netstat -lt
+----
+
+=== Listing all UDP Listening Ports
+
+[source,bash]
+----
+netstat -lu
+----
+
+
+=== Listing all UNIX Listening Ports
+
+[source,bash]
+----
+netstat -lx
+----
+
+
+=== Showing Statistics by Protocol
+
+[source,bash]
+----
+netstat -s
+----
+
+=== Showing Statistics by TCP Protocol
+
+[source,bash]
+----
+netstat -st
+----
+
+=== Showing Statistics by UDP Protocol
+
+[source,bash]
+----
+netstat -su
+----
+
+=== Displaying Service name with PID
+
+[source,bash]
+----
+netstat -tp
+----
+
+
+=== Displaying Promiscuous Mode
+
+Displaying Promiscuous mode with -ac switch, netstat print the selected information or refresh screen every five second. Default screen refresh in every second. + 
+
+[source,bash]
+----
+ netstat -ac 5 | grep tcp
+----
+
+=== Setting Promiscuous Mode
+
+[source,bash]
+----
+ ifconfig eth0 promisc
+
+OR
+
+ip link set eth0 promisc on
+----
+
+=== Remove Promiscuous Mode
+
+[source,bash]
+----
+ ifconfig eth0 –promisc
+----
+
+
+.Promiscuous Mode
+[NOTE]
+====
+Promiscuous mode is a mode for a wired network interface controller (NIC) or wireless network interface controller (WNIC) that causes the controller to pass all traffic it receives to the central processing unit (CPU) rather than passing only the frames that the controller is specifically programmed to receive. 
+
+When a capable NIC is placed in Promiscuous Mode, it allows the NIC to intercept and read each arriving network packet in its entirety. 
+
+If the NIC is not in Promiscuous Mode, it will only receive packets that are specifically addressed to the NIC. Promiscuous Mode must be supported by the NIC and by the operating system and any associated driver. Not all NICs support Promiscuous Mode, however it is pretty easy to determine if you have a NIC and OS capable of Promiscuous Mode.
+====
+
+
+=== check if promiscuous mode is enabled on network interface
+
+[source,bash]
+----
+
+netstat -i
+
+Iface      MTU    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
+eth0      1500     8352      0      0 0         12677      0      0      0 BMRU
+lo       65536    14656      0      0 0         14656      0      0      0 LRU
+
+ifconfig eth0 promisc
+
+netstat -i
+
+Iface      MTU    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
+eth0      1500     8352      0      0 0         12677      0      0      0 BMPRU
+lo       65536    14696      0      0 0         14696      0      0      0 LRU
+
+ifconfig eth0 -promisc
+
+netstat -i
+
+Iface      MTU    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
+eth0      1500     8353      0      0 0         12677      0      0      0 BMRU
+lo       65536    15232      0      0 0         15232      0      0      0 LRU
+
+
+----
+
+.Promiscuous Mode
+[NOTE]
+====
+Look under the last column “Flg” for value “P”. If it’s there, it means promiscuous mode is enabled for that network interface + 
+B flag is for broadcast + 
+M flag is for multicast + 
+P flag is for promisc mode + 
+R is for running + 
+U is for up + 
+
+====
+
+
+
+
+[appendix]
+== How to use Nmap
+
+While the basis of Nmap's functionality is port scanning, it allows for a variety of related capabilities including:
+
+- Network mapping: Nmap can identify the devices on a network (also called host discovery), including servers, routers and switches, and how they're physically connected.
+- OS detection: Nmap can detect the operating systems running on network devices (also called OS fingerprinting), providing the vendor name, the underlying operating system, the version of the software and even an estimate of devices' uptime.
+- Service discovery: Nmap can not only identify hosts on the network, but whether they're acting as mail, web or name servers, and the particular applications and versions of the related software they're running.
+- Security auditing: Figuring out what versions of operating systems and applications are running on network hosts lets network managers determine their vulnerability to specific flaws. If a network admin receives an alert about a vulnerability in a particular version of an application, for example, she can scan her network to identify whether that software version is running on the network and take steps to patch or update the relevant hosts. Scripts can also automate tasks such as detecting specific vulnerabilities.
+
+
+
+
+
+
+
+
+:hardbreaks:
+
+{empty} +
+{empty} +
+{empty} 
+
+:!hardbreaks:
+
+'''
+
+.Reminder
+[NOTE]
+====
+:hardbreaks:
+Caminante, no hay camino, 
+se hace camino al andar.
+
+Wanderer, there is no path, 
+the path is made by walking.
+
+*Antonio Machado* Campos de Castilla
+====
diff --git a/sec/header.adoc b/sec/header.adoc
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--- /dev/null
+++ b/sec/header.adoc
@@ -0,0 +1,5 @@
+[options="header"]
+|=======================
+|http://docs.swarmlab.io[Home] icon:home[link="http://docs.swarmlab.io", window="_self"]|http://docs.swarmlab.io/Howtos[HowTos] icon:wpbeginner[link="http://docs.swarmlab.io/Howtos", window="_self"]|http://docs.swarmlab.io/lab[Labs] icon:mixcloud[link="http://docs.swarmlab.io/lab", window="_self"]
+|=======================
+[.right.text-center]
diff --git a/sec/sec.adoc b/sec/sec.adoc
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+++ b/sec/sec.adoc
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+= Ασφάλεια Δικτύων και Επικοινωνιών !
+Apostolos rootApostolos@swarmlab.io
+// Metadata:
+:description: Intro and Install
+:keywords: sec, iptables
+:data-uri:
+:toc: right
+:toc-title: Πίνακας περιεχομένων
+:toclevels: 4
+:icons: font
+:source-highlighter: highlight
+:sectnums: 
+
+
+include::header.adoc[]
+
+
+
+
+{empty} +
+
+
+[[cheat-Docker]]
+== Install swarmlab-sec (Home PC)
+
+- Install docker + 
+http://docs.swarmlab.io/Howtos/docker/install.adoc.html[^]
+
+- Clone repo https://git.swarmlab.io:3000/swarmlab/swarmlab-sec + 
+HowTo: See http://docs.swarmlab.io/Howtos/git/use-git.adoc.html 
+
+.INSTALL
+[NOTE]
+====
+See INSTALL.md for Installation Instruction
+====
+
+.lab
+[NOTE]
+====
+In Lab's everything is ready!
+Goto  "create"
+====
+
+[[cheat-swarmlab-sec]]
+== Usage  (swarmlab-sec)
+
+
+- Open a console
+
+- Create a directory
+
+```
+cd dir
+swarmlab-sec <tab><tab>
+
+create       create project      (swarmlab-sec create)
+up           start swarmlab-sec  (swarmlab-sec up size=10)
+scale        resize swarmlab-sec (swarmlab-sec scale size=30)
+reload       rebuild image       (swarmlab-sec reload size=15)
+login        login swarmlab-sec  (swarmlab-sec login)
+exec         execute command     (swarmlab-sec exec [SHELL COMMAND])
+down         stop swarmlab-sec   (swarmlab-sec down)
+clean        clean project       (swarmlab-sec clean)
+list         show instances      (swarmlab-sec swarmlab-sec list)
+help         show help           (swarmlab-sec help)
+```
+
+[NOTE]
+====
+Using the tab key to automatically complete unambiguous commands and paths in Bash
+====
+
+
+[[cheat-swarmlab-create]]
+== Create swarmlab project
+
+```
+mkdir myproject
+cd myproject
+swarmlab-sec create
+```
+.Relevant files:
+```
+Project
+├── Dockerfile          # Image specification
+├── project             # Sample program source code
+│   └── hello_world.c
+├── ssh                 # keys for accessing
+│   ├── id_rsa          # (could generate your own)
+│   └── id_rsa.pub
+├── docker-compose.yml  # Container orchestration 
+```
+
+[[cheat-swarmlab-up]]
+== Spin up the swarmlab cluster
+
+```
+cd myproject
+swarmlab-sec up size=5
+```
+
+
+.We built a high-performing, scalable infrastructure
+image:./swarmlab-network.png[alt="Swarmlab"] +
+
+
+[[cheat-swarmlab-up1]]
+== Login to the swarmlab cluster
+
+```
+cd myproject
+swarmlab-sec login
+```
+
+
+[[cheat-swarmlab-scale]]
+== Scale cluster in real-time
+
+As the cluster running, without having to close the session, open a different terminal and go back to the project directory.
+
+```
+cd myproject
+swarmlab-sec scale size=10
+```
+
+[[cheat-swarmlab-down]]
+== shutdown swarmlab-sec cluster
+
+
+```
+cd myproject
+swarmlab-sec down
+```
+
+:hardbreaks:
+
+{empty} +
+{empty} +
+{empty} 
+
+:!hardbreaks:
+
+'''
+
+.Reminder
+[NOTE]
+====
+:hardbreaks:
+Caminante, no hay camino, 
+se hace camino al andar.
+
+Wanderer, there is no path, 
+the path is made by walking.
+
+*Antonio Machado* Campos de Castilla
+====
diff --git a/sec/swarmlab-network.png b/sec/swarmlab-network.png
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index 0000000..7691a11
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