How do I add Admin? My server is Linux

I added some plug-ins, but these plug-ins require admin permissions, I am not clear where to add admin to myself

Hi,

Only through with console in game (F1)

rcon o.grant group admin *
rcon o.usergroup add <YOURNICKNAME> admin​

Remember you need to add in your autoexec.cfg or hosts.sh addadmin <YOURSTEAMID64>