I'm a brand new server hoster who has no idea what to do when an update comes out.

[CRAXel]

So yesterday the new GMOD update came out, and when people try to join my server now, it says "Disconnect: Server uses different class tables". What do I do? How do I update my server for them? I already tried the hldsupdatetool and the SteamCMD "appupdate" command. The exact thing I typed into SteamCMD was "appupdate 4020 validate" which I got off of youtube, and it didn't work. Please help!

[Rubat]

Hldsupdate tool is outdated. Don't use it. If you fail with SteamCMD, see GMod wiki, it has tutorial on this in the "For server owners" section.