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init-setup.md

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Init Setup

Create User

  • Create sudo user 
    # Create the user
sudo adduser $NEW_USERNAME
# Add to sudo group
sudo usermod -aG sudo $NEW_USERNAME
  • Copy SSH authorized keys 
    mkdir /home/$NEW_USERNAME/.ssh
cp /root/.ssh/authorized_keys /home/$NEW_USERNAME/.ssh/
chown -R $NEW_USERNAME:$NEW_USERNAME /home/$NEW_USERNAME/.ssh/

SSH Settings

  • (Optional) SSH settings 
    # Change the SSH Port
sudo sed -i "s/#Port 22/Port $NEW_SSH_PORT/g" /etc/ssh/sshd_config
# Allow the new port in firewall
sudo ufw allow $NEW_SSH_PORT/tcp
# Disable password authentication on SSH
sudo sed -i "s/PasswordAuthentication yes/PasswordAuthentication no/g" /etc/ssh/sshd_config
# Disable root login on SSH
sudo sed -i "s/PermitRootLogin yes/PermitRootLogin no/g" /etc/ssh/sshd_config
sudo sed -i "s/#PermitRootLogin prohibit-password/PermitRootLogin no/g" /etc/ssh/sshd_config
# Restart the service
sudo systemctl restart ssh

Basic Setup

  • Set timezone 
    # Set timezone
timedatectl set-timezone $TIMEZONE
  • Update and upgrade the packages 
    # Update the package lists that need upgrading
sudo apt update
# Upgrade packages and its dependencies
sudo apt dist-upgrade