[root@centos var]# service mysqld stop

MySQL manager or server PID file could not be found![ FAILED]

Delete superfluous

Notes

#log-bin=mysql-bin

If you kill the process, you still can’t

If the log path is not specified, you can see the error information in the localhost.err file in/data/MySQL

If there is no dead process in the thread, you can first look at the service MySQL status to see the status and delete the superfluous things according to the prompts

Go to/data/MySQL, which is your database directory, and delete the unnecessary items, including localhost. Err and other indexes

If you restart service mysql start several times, you can restart successfully