Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

解决步骤：

1,rm -rf /var/lib/mysql/mysql.sock

2,mkdir /var/run/mysqld

3,chown mysql.mysql /var/run/mysqld

以上步骤已经解决了mysql的登陆问题：
启动mysql：systemctl start mysqld
查看mysql状态：systemctl status mysqld

接下来就可以登入了

ok！