My Mopidy doesn't start

I just installed Mopidy and wanted to start it, but it always stops at:

INFO     MPD server running at []:6600
INFO     HTTP server running at []:6680
^CINFO     Interrupted. Exiting...

How can I fix this?

By pressing Ctrl+C, you are asking Mopidy to shut down again. Mopidy does not deamonize itself and go into the background. Either use an init script (included by at least Arch, Debian and Ubuntu distributions of Mopidy) to start Mopidy at boot or start Mopidy in e.g. a screen to keep it running after you close the terminal.