I recently had the need to restart Plesk on a server. Everything on the server was running just fine, but Plesk was not responding.
After some searching I found these handy lines that allowed me to get Plesk back up and running.
# /etc/rc.d/init.d/psa stopall # /etc/rc.d/init.d/psa start |
Note: Must be run as root, or su.