I encountered with the error Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' in Ubuntu 12.04.5 LTS.
So,I uninstalled mysql 5.5 from Ubuntu 12.04.5 LTS.But when i tried to install mysql,i was unable to install mysql.
i used the following commands to uninstall mysql:
sudo apt-get remove --purge mysql-server mysql-client mysql-common
sudo apt-get remove --purge mysql-server-5.5 mysql-client-5.5 mysql-servercore-5.5 mysql-client-core-5.5
sudo apt-get autoremove
sudo apt-get autoclean
sudo rm -rf /var/lib/mysql
sudo rm -rf /etc/mysql
sudo deluser mysql
I used the following commands to install mysql 5.5:
sudo apt-get install mysql-server-5.5
sudo apt-get install mysql-server
But i was encountered with the following error:
AppArmor parser error for /etc/apparmor.d/usr.sbin.mysqld in /etc/apparmor.d/usr.sbin.mysqld at line 9: Could not open 'abstractions/mysql'
start: Job failed to start
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing mysql-server-5.5 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.5; however:
Package mysql-server-5.5 is not configured yet.
dpkg: error processing mysql-server (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
mysql-server-5.5
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
When i type 'mysql' from terminal it returns the error:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
I tried telnet 127.0.0.1 3306 after googling,it returned connection refused.
Can anyone please suggest a solution?
Best Answer
Here is what fixed for me with Mariadb
First find out if your mysql config file ,most likely located at
/etc/mysql/my.cnf
or/etc/my.cnf
has the correct mysql.sock entry or notYou can find out where mysql.sock file is located by running
find / -type s
, if the entry is not correct in your mysql config, file fix it , also make sure mysql.pid has the correct path as well.Now try to start mysql server , if it starts fine and you can see all DB's and tables within , you are good and dont need to follow rest of the post .
If mysql fails to start after fixing mysql.sock path , read on
Add the following to your my.cnf file ,
innodb_force_recovery = 1
inside themysqld
block , and restart mysql.If it fails to start , increment the number by one each time , but keep in mind , after 3 , their might be some data loss (not happened to me , but i have only read about anything above 3 being a salvaging measure , than a recovery)
Dont panic if some of the tables you previously had , stop showing that they dont exist in the engine . Ones mysql starts successfully (if you dont have a backup yet , better make one now , just in case things go south from here on) , remove
innodb_force_recovery = 1
from my.cnf file and restart mysql again , all your tables should be available again.Posts that helped me