the easiest way to uninstall a minecraft mod (like single player commands)
is to replace the jar file to do this
1.start minecraft.exe(starting minecraft in a web browser will not work)
2. select options
3.click force update
4. login and the minecraft jar files will redownload (you will still keep your saves and texture packs)
Chat with our AI personalities
no
In multiplayer, commands are generally started with a "/" Single player commands have not yet been added, unless you get a mod that has commands, like WorldEdit. They will be added in the next update, 1.3.
you can install Single Player Commands and there is a freecam option.
Each server as its own set of commands. There is not a list of all commands available as they are different from server to server. If you want to know the commands you can use on a single player world, just use /help you the list.
Try a mod. You could use InvEdit or SPC (Single Player Commands).