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What to Do if MySql.sock File is Missing

If your MySQL connection is failing and returning the message ERROR 2002 (HY000): Can’t connect to local MySQL server through socket, then chances are your MySql.sock file is missing or has been deleted.

By following these steps, you’ll be able to diagnose and determine which actions must be taken to get your MySql.sock file back in working order.   

 

Locating a Missing MySql.sock File

To locate a missing mysql.sock file, use the following procedure:

  1. THIS IS THE MOST IMPORTANT STEP! Back up the /var/lib/mysql directory using the following command
     
    # cp -fr /var/lib/mysql /var/lib/mysql.old
     
  2. Next, check /var/lib/mysql and /tmp for the .sock file (is it in both places?)
     
  3. Use this command to recreate the symbolic link to the .sock file:
     
    # ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock
     
  4. Now check the permissions of the /var/lib/mysql. It should be 0755 and mysql:root. If not:
     
    # chmod 0755 /var/lib/mysql
    # chown mysql:root /var/lib/mysql

     
  5. cat /etc/passwd to make sure that the mysql user is there.
     
  6. Does /var/lib/mysql/mysql/host.MYI exist? If not then:
     
    # chmod -R 0660 /var/lib/mysql/mysql
    # chown -R mysql:mysql /var/lib/mysql/mysql
    # /usr/bin/mysql_install_db

     
  7. Now try to force an update:
     
    # /scripts/mysqlup --force  // for cPanel servers only
     
  8. If all else fails, then you may have a corrupted table. Now before you do this, TRIPLE CHECK that you have backed up the /var/lib/mysql directory. It fact, check it 4 times!
     
    # rm -fr /var/lib/mysql
    # rm -f /usr/sbin/mysqld

     
    Then force another update:
     
    # /scripts/mysqlup --force
     
  9. Now if all if this did not help, then try:
     
    # /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/Server_HostName.pid --skip-locking &

 

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While our competitors may advertise DDoS protection, most often, they are merely implementing easily evaded router rules or simply black-holing targeted servers. They consider this “DDoS protecting their network.” However, neither of these solutions should give comfort to any online business. Should your site be attacked, chances are likely both of these options will end with your server being taken offline. At Hivelocity, we take the responsibility of keeping your servers online very seriously. For this reason, we offer two very serious forms of DDoS protection.

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