diff --git a/project_info.adoc b/project_info.adoc
index 20da220..0cb879d 100644
--- a/project_info.adoc
+++ b/project_info.adoc
@@ -41,26 +41,21 @@ sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
 ```
 
 ==== error
-====
-----
+```
 Get https ://registry.vlabs.uniwa.gr:5080/v2/: x509: certificate
 Pulling  ...
 ERROR: Get https://registry.vlabs.uniwa.gr:5080/v2/: x509: certificate signed by unknown authority
-----
-====
+```
 
 * run
 
-====
-----
+```
 $ sudo su 
 # touch set-ca.sh
-----
-====
+```
 
 * copy-paste into file
-====
-----
+```
 registry_address=registry.vlabs.uniwa.gr
 registry_port=5043
 mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
@@ -77,39 +72,35 @@ openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/nul
 registry_port=5480
 mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
 openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt
-----
-====
+```
+  
 * exec file
-====
-----
+  
+```
 sudo bash ./set-ca.sh
-----
-====
+```
+  
 === Δημιουργία σμήνους (swarm) από Docker
 ==== Δημιουργία cluster
 * Make a new directory to store the project +
-====
-----
+```
 mkdir myproject
 cd myproject
 ../install/usr/share/swarmlab.io/sec/swarmlab-sec create
-----
-====
+```
 
 * Spin up the cluster (5 clusters shown here) +
-====
-----
+```
 cd myproject #if not already on the directory 
 ../install/usr/share/swarmlab.io/sec/swarmlab-sec up size=5
-----
-====
+```
 
 * Login to the cluster +
 ====
-----
+```
 cd myproject #if not already on the directory
 ../install/usr/share/swarmlab.io/sec/swarmlab-sec login
-----
+```
 NOTE: When you are inside a container: +
 `ssh docker@<IP>` +
 User password: docker +