linux - mysql：启动 mysql

启动mysql

第一种：

/etc/rc.d/init.d/mysqld start

/etc/rc.d/init.d/mysqld stop

第二种：使用service 启动、关闭MySQL服务

service mysql start

service mysql stop

service mysql restart

 

异常

service mysql start 出错

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出错内容：mysql: unrecognized service或mysql: 未被识别的服务

解决方法：

[[email protected] ~]# service mysql start

mysql: unrecognized service

[[email protected] ~]# service mysql restart

mysql: unrecognized service

[[email protected] ~]# rpm -q mysql   查询发现mysql已经正常安装

mysql-5.1.52-jason.1

[[email protected] ~]# /etc/rc.d/init.d/mysqld start  直接启动没问题

Starting mysqld:  [  OK  ]

[[email protected] ~]# 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

[[email protected] ~]# chkconfig mysqld on 设置mysql开机启动

[[email protected] ~]# chmod 755 /etc/rc.d/init.d/mysqld  修改mysqld执行权限

[[email protected] ~]# service mysqld start  搞定

Starting mysqld:  [  OK  ]

[[email protected] ~]# service mysqld start

Starting mysqld:  [  OK  ]

[[email protected] ~]# service mysqld status

mysqld (pid 9487) is running...

Mysql启动失败

问题描述：Another MySQL daemon is already running.

原因：多个Mysql进程使用了同一个socket

解决方案一：

service mysqld stop//停止mysql

mv /var/lib/mysql/mysql.sock /var/lib/mysql/mysql.sock.bak//修改名称

service mysqld start//启动mysql

解决方案二：

ps -A //查看所有进程

killall -9 *** //杀死正在运行的mysql进程