How do I restart Parallels Plesk Panel

This can be done using the following commands when logged in as root via SSH on the Parallels Plesk Panel (PP) server:

Parallels Plesk Panel for Linux:

~# /etc/init.d/psa stop
~# /etc/init.d/psa start

Parallels Plesk Panel installed on FreeBSD server in versions prior to 8.1:

~# /usr/local/psa/rc.d/psa stop
~# /usr/local/psa/rc.d/psa start

Parallels Plesk Panel on FreeBSD since version 8.1:

~# /usr/local/etc/rc.d/psa.sh stop
~# /usr/local/etc/rc.d/psa.sh start