Apr 28 07:00:01 prado postgresql@9.6-main[67321]: The PostgreSQL server failed to start. Please check the log output:
Apr 28 07:00:01 prado postgresql@9.6-main[67321]: 2017-04-28 07:00:00 UTC [67327]: [1-1] FATAL: could not write lock file "postmaster.pid": No space left on device
Apr 28 07:00:01 prado systemd[1]: postgresql@9.6-main.service: Control process exited, code=exited status=1