[root@localhost gaoziqiang]# service mysql start
Starting MySQL. ERROR! The server quit without updating PID file (/var/lib/mysql/localhost.localdomain.pid).
[root@localhost gaoziqiang]# chown -R mysql:mysql /var/data
chown: cannot access ‘/var/data’: No such file or directory
[root@localhost gaoziqiang]# chown -R mysql:mysql /var/lib/mysql/localhost.localdomain.pid
chown: cannot access ‘/var/lib/mysql/localhost.localdomain.pid’: No such file or directory
[root@localhost gaoziqiang]# chown -R mysql:mysql /var/lib/mysql/