I'm trying to use commands from some of the plugins I added but they say unknowned commands or you don't have the right permission. When I go to do "group add owner" in console it says "command group not found" so I'm a little stuck here.

For the permissions which ever plugins you are using make sure you grant your self the permissions listed in the plugins page description and as for groups if you want to add users to groups maybe use something like better chat?

where you can make groups and add users to them and you can grant the permissions to that group instead of the player.

https://umod.org/plugins/better-chat

I'd recommend reading over: https://umod.org/documentation/plugins/permissions

The command you are looking for is "oxide.group" or "o.group", not just "group".

@RustAura, Better Chat is not the permissions/group system.