Please search the forums. There are several questions about that as well…
But anyways:
In the server profiles??
As in here:
/var/games/minecraft/profiles/ ?
That is not where I asked you to look for logs
FTB has a separate log as well, and do quite a lot of work before the minecraft java (and the minecraft server logs) start. Please provide that as well:
/var/games/minecraft/servers/(the name of your server)/logs/fml-server-latest.log
