问题
I'm facing this problem for few days now. I'm trying to connect to my MySQL on Ubuntu machine. But I'm not getting this thru. Please see the following commands that I ran and the error messages.
root@ipadtest:/var/lib/mysql# mysql start
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)
root@ipadtest:/var/lib/mysql# mysql -uroot -p
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored Enter password: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)
root@ipadtest:/var/lib/mysql# mysqld
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored 150821 11:34:38 [ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!
150821 11:34:38 [ERROR] Aborting
150821 11:34:38 [Note] mysqld: Shutdown complete
root@ipadtest:/var/lib/mysql# mysql restart
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)
root@ipadtest:/var/lib/mysql# mysqladmin -u root -p status
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored Enter password: mysqladmin: connect to server at 'localhost' failed error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)' Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists!
Could anyone please tell what is the issue. It seems to me that DB has been corrupted. If yes, then how can I recover? TIA.
回答1:
The error is very clearly explained in the warning message, it is ignoring your my.cnf.
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored
Try executing the following, and then restarting the server
chown mysql:mysql /etc/mysql/my.cnf
chmod 600 /etc/mysql/my.cnf
This will set the owner of the file to mysql and the permissions 600 will give only the user mysql access to read and write to the file, it will disallow access to all other users.
回答2:
Check owner of /etc/mysql/my.cnf that it's actualy mysql and do a
chmod go -rw /etc/mysql/my.cnf
service mysql restart
It's obviously totally ignoring whats configured and trying to connect through local socket which is probably not open.
来源：https://stackoverflow.com/questions/32133353/unable-to-connect-to-mysql-database-in-ubuntu