Hi Shoto, if you want to manage the servers outside the webui, you can use mineos_console.js:
Examples:
cd /usr/games/minecraft
./mineos_console.js -s myserver accept_eula
Or other examples:
./mineos_console.js -s myserver start
./mineos_console.js -s myserver kill
./mineos_console.js -s myserver stuff "hello everybody here!"
These commands can be run as root from mineos_console.js, but also can be run by the server owner, as well.