Enforce various channel modes and set options. The channel option indicates what channel to enforce the modes and options on. The what option indicates what modes and options to enforce, and can be any of SECUREOPS, RESTRICTED, REGONLY, SSLONLY, BANS, or LIMIT...

Why can’t I use my Nickname?

There may be cases where your Nickname is either in use or held by Services -- either of which can be resolved. (If you have registered your nickname with NickServ.)