service mysql start出错，mysql启动不了，解决mysql: unrecognized service错误的方法如下：
[root@ ~]# service mysql start
mysql: unrecognized service
[root@ ~]# service mysql restart
mysql: unrecognized service
[root@ ~]#javascript rpm -q mysql
查询发现mysql已经正常安装
mysql-5.1.52-jason.1
[root@ ~]#/etc///mysqld start
直接启动没问题
Starting mysqld: [ OK ]
[root@ ~]# ls /etc///mysqld -l
-rwxr-xr-x 1 root root 5509 Dec 18 02:31 /etc///mysqld
[root@ ~]#chkconfig mysqld on
设置mysql开机启动
[root@ ~]# chmod 755 /etc///mysqld
修改mysqld执行权限
[root@ ~]# service mysqld start
Starting mysqld: [ OK ]
搞定
[root@ ~]# service mysqld start
Starting mysqld: [ OK ]
[root@ ~]# service mysqld status
mysqld (pid 9487) is running…
本人亲测有效