Question

When i connect my database by a php script it shows

Could not connect: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

the username and password is right.

something of the my.cnf

[client]
#password       = your_password
port            = 3306
socket          = /data/mysql/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
port            = 3306
socket          = /data/mysql/mysql.sock
skip-external-locking

ps: i change it to socket = /var/lib/mysql/mysql.sock the php script still says “/var/lib/mysql/mysql.sock”?. then run

  mysqladmin -u root -p status

it shows

mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!




service mysqld restart


mysqld: unrecognized service

Answer 1

Q: Does your my.conf still says “/var/lib/mysql/mysql.sock”?

Q: Does the directory “/var/lib/mysql” exist?

Q: Does your mysql user (or better, mysql group) have writer permission?

If so, please try re-starting mysql and see what happens.

ADDENDUM:

One other thing to try is to create a mysql.sock and explicitly give it permissions:

cd /var/lib
mkdir mysql
touch mysql/mysql.sock
chown -R mysql:mysql mysql