Triangle.gs server not starting [closed]

When I got on this morning, it was having problems. Many. All of our achievements restarted and none of the nether portals were working. I've been looking at it all day to try and fix it. I went in to "start" my server but it always says offline after that. I looked in the Console thing and this is what it says * Error: Invalid or corrupt jarfile server.jar Command running: Starting server process ... /start: line 155: echo: write error: No space left on device /start: line 154: echo: write error: No space left on device

I looked on how much megabytes its taking but it still says 0. I don't know what to do.