几步就OK！！！

[root@yb ~]# rpm -q mysql 查询发现mysql已经正常安装
mysql-5.1.52-jason.1
[root@yb ~]# /etc/rc.d/init.d/mysqld start 直接启动没问题
Starting mysqld: [ OK ]
[root@yb ~]# ls /etc/rc.d/init.d/mysqld -l
-rwxr-xr-x 1 root root 5509 Dec 18 02:31 /etc/rc.d/init.d/mysqld
[root@yb ~]# chkconfig mysqld on 设置mysql开机启动
[root@yb ~]# chmod 755 /etc/rc.d/init.d/mysqld 修改mysqld执行权限
[root@yb ~]# service mysqld start 搞定
Starting mysqld: [ OK ]