If you need to make sure a script is run as root, add the following to the start of the script: if [[ $UID -ne 0 ]]; then echo "$0 must be run as root" exit 1 fi ...

Do you know what your Proxmox server is actually running?

BASH is a Unix shell and command language which can run Shell Script files. You do not need to install Ubuntu or any other Linux Distros unless your scripts need the ...