Mysql database password modification

When using databases ,MySQL Need to change the password .

1. Use SET PASSWORD command

1. Enter the command mysql -u root -p Appoint root The user login MySQL, After entering, press enter to enter the password . If the environment variable is not configured , Please be there. MySQL Of bin Login operation under directory .
2. Use SET PASSWORD Change password command format to set password for username @localhost = password(newpwd);
   , among username For the user name to change the password ,newpwd For the new password to be changed . As shown in the figure .
   
3. Input quit; Command exit MySQL Log back in ;

2. Use mysqladmin Change Password

   Use mysqladmin Command to change MySQL Of root The format of user password is mysqladmin -u user name -p Old password password New password .

Be careful ： The following figure shows the command to change the password -uroot and -proot It's the whole , Don't write as -u root -p root,-u and root Space can be added between , But there will be warnings , So don't add spaces .

3. UPDATE Direct editing user surface

1. Enter the command mysql -u root -p Appoint root The user login MySQL, After entering, press enter to enter the password . If the environment variable is not configured , Please be there. MySQL Of bin Login operation under directory .
2. Input use mysql; Command to connect to the permission database .
3. Enter the command update mysql.user set authentication_string=password(‘ New password ’) where user=‘ user name ’ and Host =‘localhost’; Set new password .
4. Input flush privileges; Command refresh permission .
5. Input quit; Command exit MySQL Log back in .

4. When the previous method reports an error, the following methods can be adopted:

1. Enter the command mysql -u root -p Appoint root The user login MySQL, After entering, press enter to enter the password . If the environment variable is not configured , Please be there. MySQL Of bin Login operation under directory .
2. Input use mysql;
3. Enter the command alter user ‘root’@‘localhost’ IDENTIFIED BY ‘123456’;
4. Input flush privileges; Command refresh permission .
5. Input quit; Command exit MySQL Log back in .