安装完 MySQL，启动服务报错。
service mysql start
2019-01-31 17:17:39 1721 [ERROR] Can‘t start server : Bind on unix socket: Permission denied 2019-01-31 17:17:39 1721 [ERROR] Do you already have another mysqld server running on socket: /var/lib/mysql/mysql.sock ? 2019-01-31 17:17:39 1721 [ERROR] Aborting
给 mysql.sock 文件所在的目录赋予权限，命令如下：
cd /var/lib/mysql chown -R mysql:mysql ./
Do you already have another mysqld server running on socket: /var/lib/mysql/mysql.sock ?
原文：https://www.cnblogs.com/miracle-luna/p/13328623.html