ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

July 23, 2017 13.8k views
WordPress MySQL Linux Commands CentOS

Hi,
I currenty have a LAMP, running on Centos, everything was fine, but my MYSQL is not working.

When i try to connect via

mysql -u root -p

I get the error:

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

Note: This error has been occur, when i will install WordPress theme on my Site, after this, i will click on the Import Demo Button to import the FrontPage, then error occur.

5 Answers

@Mohsen47

Dear, When i will enter this command on PuTTy, i get an error
tail: cannot open ‘/var/log/mysql/error.log’ for reading: No such file or directory
Note: I have 512 MB Ram Server with lot of Bandwidth Available. I Will Deploy Server and Start Installing WordPress, everything was fine, but when i will try to install theme, after this it shows an database error.

  • Hi @salmanafzal

    You need at least 1GB RAM to run WordPress - even more so, when you import demo data.
    You can resize your droplet after shutting it down via the control panel.

@salmanafzal

The error message means that mysql process has crashed for some reason please share your mysql error log by giving as the output of this command

tail -20 /var/log/mysql/error.log

My guess is that your droplet is running out of memory how much memory did you allocate for it?

Hope this helps.

Restart MySQL

service mysqld start

if using MariaDB use

sudo systemctl start mariadb

lsof -i:3306
kill the running process with
kill -9 PID
then restart the mysql service

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