MySQL启动报错： Failed to start LSB: start and stop MySQL.

MySQL启动报错： Failed to start LSB: start and stop MySQL.与连接而数据库报错：ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

今天在配置部署一台MySQL服务器，安装成功后，自动启动了 mysql服务，此时默认的mysql的data是在/var/lib/mysql下的，我想把他改成/mysql/mysql-data下，于是
systemctl stop mysql
ss -antup | grep mysql
已经停止mysql服务
修改配置文件
vim /etc/my.cnf
datadir=/mysql/mysql-data
socket=/mysql/mysql-data/mysql.sock

mkdir -p /mysql/mysql
启动服务：systemctl start mysql
结果报错： Failed to start LSB: start and stop MySQL.
经过一番排查和原来的data目录一对比后，发现是权限问题
查看配置文件

ps -ef | grep mysql,发现启动用户是mysql
于是：
chown mysql:mysql /mysql/mysql-data
systemctl start mysql 启动成功

接着我进入数据库