[root@m1 ~]# chkconfig --list|grep mysql
mysqld          0:off   1:off   2:off   3:off   4:off   5:off   6:off
[root@m1 ~]# chkconfig mysqld on
[root@m1 ~]# chkconfig --list|grep mysql
mysqld          0:off   1:off   2:on    3:on    4:on    5:on    6:off