[20:28:11] [Server thread/ERROR]: Could not save bukkit.yml java.io.FileNotFoundException: bukkit.yml (Permission denied)

Server can’t start, logs:
http://pastebin.com/8E3hRDJD

Best bet is the bukkit.yml file is owned by root. This often happens when user do administrative tasks as root from the command line.

How can I change owner?

This is solve:
“chown -R minecraft:minecraft /var/games/minecraft/servers”