[MySQL 05] SUSE 12 SP5 modifies the MySQL password for the first time after installing MySQL

1、 View installed MySQL edition ：

 command ：mysql --version

2、 start-up MySQL service

 start-up  MySQL  service ：systemctl start mysql.service
 restart  MySQL  service ：systemctl restart mysql.service
 close  MySQL  service ：systemctl stop mysql.service

3、 Check MySQL Whether the service starts

 Method 1：systemctl list-unit-files|grep mysqld.service

 Method 2 ：systemctl status mysql.service

4、 Set the password

4.1 View random password

rpm install MySQL Will automatically generate a random password , Can be found in /var/log/mysqld.log Find the password in this file

 command ：cat /var/log/mysql/mysqld.log |grep temp

Tips： If you are unsure of the path , have access to find Command find mysqld.log file

4.2 Log in with random password

 command ：mysql -uroot -ppCg3+El.c#ao

4.3 modify root User password

 command ：ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY ' password ‘;

Here may be a hint Your password does not satisfy the current policy requirements, Your password does not meet the requirements of the current regulations , You can either make your password a little more complicated , Or lower the password verification rules .

stay Linux Installation on MySQL A plug-in for verifying passwords will be installed automatically , The default password checking policy requires that the password must contain ： Case letters 、 Numbers and special symbols , And the length cannot be less than 8 position . Whether the new password conforms to the current policy when changing the password , If you are not satisfied, you will be prompted ERROR;

The password verification rules can be found on the official website , Search in documents ：validate_password;

So you can set this limit to a smaller number of digits , Lower the complexity type

#  Adjust password complexity check to simple type 
set global validate_password.policy = 0;
#  Set the minimum number of digits of password to  9  position 
set global validate_password.length = 9;

You can set a simpler password .

5、 Create user and permission assignment

<1> default root Users can only the current node localhost visit , Is not remotely accessible , We also need to create a new account , For remote access

 Grammar format ：CREATE USER < user name > [ IDENTIFIED ] BY [ PASSWORD ] < password >

# mysql 8.0  following 
create user 'siteweb'@'%' IDENTIFIED BY 'siteweb1!';
# mysql 8.0
create user 'siteweb'@'%' IDENTIFIED WITH mysql_native_password BY 'siteweb1!';

Tips: mysql8.0 The default password authentication for is no longer password . So when you create a user ,create user ‘username’@‘%’ identified by ‘password’; The client cannot connect to the service , So when creating users, you need to add WITH mysql_native_password

<2> After you create a user, you need to assign permissions to the user , I will be here siteweb This user is assigned all permissions

grant all privileges on *.* to 'siteweb'@'%';
flush privileges; # Refresh the permissions