mariadb ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) code example

Example 1: can't connect to local mysql server through socket '/var/run/mysqld/mysqld.sock'

# Start your mysql server
/etc/init.d/mysql start

Example 2: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

# Remove mysql
sudo apt-get remove --purge mysql\*

#update repositories
sudo apt update

# Reinstall it
sudo apt install mysql-server mysql-client

# Test if it runs
sudo mysql

# You can install also thes pachages. Optionnaly
sudo apt install php

#mesabo youbeyou

Example 3: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysql.sock' (2) Ask

##	ERROR 2002 (HY000): 
##	Can't connect to local MySQL server through socket 

#### Follow below steps and you good to go... ####
sudo dpkg-reconfigure mysql-server-{version_number}
##version_number should be mysql version number installed
## Now try login in mysql shell
sudo mysql -u root -p

Example 4: error 2002 (hy000): can't connect to local mysql server through socket '/var/run/mysqld/mysqld.sock' (2)

mysql -h 127.0.0.1 -P 3306 -u root -p <database>

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