MySQL server PID file could not be found!
无法启动mysql服务
# service mysqld start
MySQL server PID file could not be found! [FAILED]
Starting MySQL...The server quit without updating PID file [FAILED]ydata/centossz008.pid).
通过ss -tnl发现服务仍然存在
服务假死，强行将服务停用
# killall mysqld
重启
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
查看mysql数据目录权限是否正常
# chown -R mysql.mysql /data
