I have a remote server running on Arch Linux , I installed a Rust server with steamcmd . Then , I install umod with "wget https://umod.org/games/rust/download" ,then unzip it and overwrite files. Umode is installed , I can do "oxide.reload" (and all other base commands) but it will not detect plugins.
I do not run the server as a root user.

Merged post

I just run the server as a root ...

The server detecting andloading your plugins all depends on how your filesystem permissions are setup. There's no need for it to run as root, but if you start or install files as root, then that's the user you'd have to run as unless setup properly under a normal user.