Try this procedure to fix mysql.sock error: Cpanel

cd /var/lib/mysql

touch mysql.sock

chown mysql:mysql mysql.sock

chmod 1777 mysql.sock

now make a sym link into /tmp

ln -s /var/lib/mysql/mysql.sock /tmp

then

chmod 1777 /tmp

now

/scripts/mysqlup --force

now just restart mysql

/etc/rc.d/init.d/mysql restart