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

Before Ubuntu20.04 installing MySQL 8.0, ready to sudo mysqlenter, enter the carriage return

ERROR 2002 (HY000):Can't connect to local MySQL server though socket '/var/lib/mysql/mysql.sock'(2)

Looking for a long time is not found, the installation is the command to sudo apt install mysql-server mysql-clientbe installed, when a video tutorial chance to learn, to see through the installation steps to install the following commands:

sudo su
sudo apt install mysql-server mysql-client

First enter the root administrator identity, and then install, the administrator must also add it when installing sudo. So you can enter, and then enter mysql to enter the password modification. The steps for modifying the password are available online, so I won't write so many.

sudo mysql   # 进入 mysql 进行修改密码

The specific reason is not known why. I hope someone can comment and tell me.