FOSS gamedev and creative worlds

What are all the commands for servers? Anyone know?

Google knows

http://wiki.minetest.com/wiki/Server_commands

Beyond that, mods can add their own commands, so some server have even more.

When logged in to a server, type the command "/help all" and you will see all available commands.

And remember, Google knows all. Much more thank you'd be comfortable with actually.....