Problems encountered in using MySQL

1、 Problem description

this morning mysql Still using , In the afternoon , Just say my password is wrong and I can't log on .

But I have never touched any other configuration ？

2、 terms of settlement

Here I reload mysql. If you don't have important data, you can do this . If there's important data , Try backing up your data first .

• First delete all mysql The dependent libraries

sudo pacman -R mysql libmysqlclient mysql-clients

• Then delete mysql Configuration file for ( Go to the super user interface first )

cd /var/lib/mysql 
rm -rf *

• install mysql

sudo pacman -S mysql

• initialization mysql（ This step obtains mysql Initial password ）

sudo mysqld --initialize --user=mysql --basedir=/usr --datadir=/var/lib/mysql

• restart mysql（ Be careful , Be sure to restart mysql）

sudo systemctl restart mysqld

• land mysql（ Use your initial password ）

mysql -u root -p

• Change Password
  Get into mysql in the future , Reset password .

I really appreciate it , Because there is no restart step , I've done it dozens of times ...