The command is unavailable because it could not be located.
The command is unavailable because it could not be located.
You're encountering an issue where the command fails because the PPA is not properly installed or recognized. It could be due to your environment being a VPS, which sometimes affects package manager behavior. Try installing the PPA manually first using `sudo apt install -c ppa:wireguard/wireguard` before retrying the sudo command.
Ensure the initial step is completed. For guidance, visit the provided link.