MySql.sock file is mostly available in folder “/mysql/tmp/”. If you mistakenly deleted the MySql.sock file then this tutorial is very helpful for you.


1. Before making any changes first you have to take backup of /var/lib/mysql directory with this command :

# cp -fr /var/lib/mysql /var/lib/mysql.old
2. Now you have to check for the MySql.sock file in both places :

/var/lib/mysql and /tmp
3. If you found the file in these folders then you have to recreate the symbolic link with this command

# ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock
4. Now its time to check the permission of the file, MySql.sock file permission should be 0755 and msql: root. If permission is wrong then enter the following command to assign the permission and user :

# chmod 0755 /var/lib/mysql
# chown mysql:root /var/lib/mysql
5. To check the MySql user you n=have to enter this :

cat /etc/passwd
6. Now check for “host.MYI” file in path host.MYI and if the file is not available then enter the following command :

# chmod -R 0660 /var/lib/mysql/mysql
# chown -R mysql:mysql /var/lib/mysql/mysql
# /usr/bin/mysql_install_db
7. Now for Linux server, you have to run this command for force updation

# /scripts/mysqlup –force
8. After update again check the MySQL directory that we have backed up :

# rm -fr /var/lib/mysql
# rm -f /usr/sbin/mysqld
9. Then again run force command to update :

# /scripts/mysqlup –force

These all steps will definitely help you to overcome this problem.

 
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