##### For an Ubuntu OS:
Firstly, you need to update your OS else they may occur problems during installations.

```
$sudo apt update
$sudo apt upgrade
```
##### Fix Network Issues
```
$sudo su
// Delete auto-generated files
#rm /etc/resolv.conf || true
#rm /etc/wsl.conf || true

//Enable changing /etc/resolv.conf
//Enable extended attributes on Windows drives
cat <<EOF > /etc/wsl.conf
[network]
generateResolvConf = false

[automount]
enabled = true
options = "metadata"
mountFsTab = false
EOF

//Use google nameservers for DNS resolution
cat <<EOF > /etc/resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4
EOF
```
##### Installation of Docker
```
$sudo -l # To ensure that we can run apt as root
$sudo apt install -y lsb-release
$sudo apt install -y curl
$curl -V # Ensure that curl is installed and in a modern version
$sudo apt install software-properties-common

$curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg # To add the gpg key on our keyring

echo \
  "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
//Add the official repo on apt or any other package manager

$sudo apt install -y docker-ce # Actually installing docker
$sudo usermod -aG docker $USER # Add current user to the docker group
$su - ${USER} # Reload our shell

$docker --version # See the docker version
$docker run  hello-world # Test if docker really works
```

##### Fix "x509: certificate signed by unknown authority" issue
```
$sudo su
#touch set-ca.sh

registry_address=hub.swarmlab.io
registry_port=5443
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

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

$sudo bash ./set-ca.sh
```
##### Docker-Compose
```
$sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
$sudo chmod +x /usr/local/bin/docker-compose
$sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
```