centos 安装mysql,启动时报错Starting MySQL.Manager of pid-file quit without updating file.[FAILED]

第一步:
vi /etc/my.cnf
查看:datadir = /usr/local/mysql/data
该路径是不是实际的data路径

若不是,修改为实际路径

第二步:
执行mysql的初始化指令:

/usr/local/mysql/scripts/mysql_install_db --user=mysql

启动mysql,问题解决。

2016/7/8
重新安装遇到的新问题:

2016-07-09 00:04:37 1852 [ERROR] Can't start server : Bind on unix socket: Permission denied
2016-07-09 00:04:37 1852 [ERROR] Do you already have another mysqld server running on socket: /var/lib/mysql/mysql.sock ?
2016-07-09 00:04:37 1852 [ERROR] Aborting

修改/var/lib/mysql的权限

cd /var/lib
chown -R mysql:mysql mysql

重新启动,问题解决

2016/7/20

重要:
修改/etc/my.cnf
注释掉[mysqld-safe]的相关内容,重启MySQL

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