Hi, I have set up a personal server on our laptop for my son to play with a couple friends and his brothers. I followed the instructions from wiki-how and it works fine. While on the the server, we tried to use commands, like /gamemode 0, it didn't work. The only one that did was /list. From more research, it was stated to set op, so I went to the op.json file and typed in exactly what I was told from the wikihow. Still doesn't work. One of the forum's threads told the poster to use bukkit. Is it necessary to use bukkit? Is there no other solution that would fix the commands?