root@s1 Downloads]# service mysql restart
MySQL server PID file could not be found! [FAILED]
MySQL server PID file could not be found! [FAILED]
[root@s1 Downloads]# service mysql stop
MySQL server PID file could not be found! [FAILED]
解决方法：
1.通过ss -tnl命令查看服务
[root@s1 Downloads]# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 50 *:3306 *:*
2，停止mysql服务
[root@s1 Downloads]# killall mysqld
3.重启mysql服务
4.发现mysql数据目录权限异常
[root@s1 Downloads]# mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
5.修改mysql数据目录权限
[root@s1 Downloads]# chown -R mysql.mysql /var/lib/mysql/
6.重启服务，即可以正常登陆mysql
MySQL server PID file could not be found! [FAILED]
解决方法：
1.通过ss -tnl命令查看服务
[root@s1 Downloads]# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 50 *:3306 *:*
2，停止mysql服务
[root@s1 Downloads]# killall mysqld
4.发现mysql数据目录权限异常
[root@s1 Downloads]# mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
5.修改mysql数据目录权限
[root@s1 Downloads]# chown -R mysql.mysql /var/lib/mysql/
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/30046312/viewspace-2142901/ ，如需转载，请注明出处，否则将追究法律责任。
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