Apache cannot start:
s17231139:~ # service apache2 start redirecting to systemctl Job failed. See system logs and 'systemctl status' for details.
error_log' contains the following error:
[Mon Mar 03 13:06:23 2014] [emerg] (22)Invalid argument: mod_fcgid: can't lock process table in PM, pid 8770 [Mon Mar 03 13:06:24 2014] [error] mod_fcgid: fcgid process manager died, restarting the server [Mon Mar 03 13:06:24 2014] [notice] SIGHUP received. Attempting to restart
Obsolete mod_fcgid package. The issue described in https://issues.apache.org/bugzilla/show_bug.cgi?id=50309
Update mod_fcgid package