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如何解决Linux主机改名后无法启动MySQL

 5 years ago
source link: https://www.linuxprobe.com/linux-mysql-reboot.html
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MySQL无法重启、无法关闭、无法启动、无法使用，如果是因为修改了主机名，可以这样解决：关闭掉所有MySQL进程，然后在启动一下MySQL。

今天无事看到自己的主机名不对，于是改了一下，以便区分服务器，结果重启mysql时出现下面错误：

MySQL manager or server PID file could not be found!      [FAILED]
Starting MySQL.Manager of pid-file quit without updating fi[FAILED]

怎么会找不到PID呢，看下面：

[root@linuxidc.com ~]#  ps aux | grep mysql
mysql    16433  0.0  0.2  36636  5756 ?        Sl  15:07  0:00 /usr/local/mysql/libexec/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/var --user=mysql --log-error=/usr/local/mysql/var/hao9goAndSecondWeb.err --pid-file=/usr/local/mysql/var/hao9goAndSecondWeb.pid --socket=/tmp/mysql.sock --port=3306
root    16992  0.0  0.0  4020  704 pts/0    S+  15:11  0:00 grep mysql

原来PID还是原来主机名.pid，运行:

kill -9 <mysqlpid> 然后 service mysql start 哈哈看到绿色的OK了，

[root@linuxidc ~]# service mysql start
Starting MySQL.                                            [ OK  ]

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