Setup Centos Linux VM and enable Nomachine remote desktop

1. Setup ssh access to the Linux VM:

   ssh ec2-user@centos_vm_2020

2. Create user account:

   sudo dnf install zsh
   sudo useradd -s /bin/zsh wxyz
   sudo usermod -a -G adm wxyz
   sudo usermod -a -G wheel wxyz
   

3. Enable ssh public key authentication (add public key to ~/.ssh/authorized.keys):

   sudo su wxyz
   mkdir ~/.ssh
   vim ~/.ssh/authorized_keys
   chmod 700 ~/.ssh/authorized_keys
   

4. Install GUI desktop:

   sudo dnf groupinstall Workstation
   

5. Install nomachine:

   cd /tmp
   wget https://download.nomachine.com/download/6.9/Linux/nomachine_6.9.2_1_x86_64.rpm
   sudo rpm -i /tmp/nomachine_6.9.2_1_x86_64.rpm
   

6. Reboot the VM:

   sudo systemctl set-default multi-user.target
   sudo systemctl isolate multi-user.target
   sudo reboot
   

7. Install gnome-tweaks:

   sudo dnf install gnome-tweaks
   

   and tweak the desktop environment on CentOS 8.
8. Enable Nomachine public key authentication (add public key to ~/.NX/config/authorized.crt):

   mkdir -p ~/.NX/config
   touch ~/.NX/config/authorized.crt
   chmod 700 ~/.NX/config/authorized.crt