IF you want to change virtual hosts location in plesk for linux. Please check below article for assistance.
CHANGING PLESK VHOSTS DIRECTORY FROM /var/www TO /home/var/www
CREATE DIRECTORIES
mkdir -p /home/var/www
rsync -avz /var/www /home/var/www
/usr/local/psa/bin/transvhosts.pl --dest-dir /home/var/www --correct-scripts