MySQL无法启动:ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

1 详细异常

ct 11 17:31:51 bd02.getngo.com mysqld[20513]: 2019-10-11T09:31:51.187848Z 0 [Note] /usr/sbin/mysqld: Shutdo
Oct 11 17:31:51 bd02.getngo.com systemd[1]: Failed to start MySQL Server.
-- Subject: Unit mysqld.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysqld.service has failed.
--
-- The result is failed.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: Unit mysqld.service entered failed state.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: mysqld.service failed.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: mysqld.service holdoff time over, scheduling restart.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: Stopped MySQL Server.
-- Subject: Unit mysqld.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysqld.service has finished shutting down.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: start request repeated too quickly for mysqld.service
Oct 11 17:31:51 bd02.getngo.com systemd[1]: Failed to start MySQL Server.
-- Subject: Unit mysqld.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysqld.service has failed.
--
-- The result is failed.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: Unit mysqld.service entered failed state.
Oct 11 17:31:51 bd02.getngo.com systemd[1]: mysqld.service failed.

　　

2 问题原因

mysql软连接错误问题 

检查一下文件权限，是否可执行，启动用户是否正确