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[转载] MySQL Change a User Password

转自:https://www.cyberciti.biz/faq/mysql-change-user-password/

How to change user password on mysql

Mysql change user password using the following method:

  1. Open the bash shell and connect to the server as root user
  2. mysql -u root -h localhost -p
  3. Run command:
  4. ALTER USER 'userName'@'localhost' IDENTIFIED BY 'New-Password-Here';

Please note that use mysql.exe on MS-Windows host as follows (first change directory where mysql.exe is located [example: “C:\Program Files\mysql\mysql-5.0.77-win32\bin”]. Let us see examples and syntax in details.

mysql sql command to change a user password

Login as root from the shell:

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mysql -u root -p

Switch to mysql database (type command at mysql> prompt, do not include string “mysql>”):

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mysql> use mysql;

The syntax is as follows for mysql database server version 5.7.5 or older:

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SET PASSWORD FOR 'user-name-here'@'hostname' = PASSWORD('new-password');

For mysql database server version 5.7.6 or newer use the following syntax:

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ALTER USER 'user'@'hostname' IDENTIFIED BY 'newPass';

You can also use the following sql syntax:

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UPDATE mysql.user SET Password=PASSWORD('new-password-here') WHERE USER='user-name-here' AND Host='host-name-here';

In this example, change a password for a user called tom:

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SET PASSWORD FOR 'tom'@'localhost' = PASSWORD('foobar');

OR

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UPDATE mysql.user SET Password=PASSWORD('foobar') WHERE USER='tom' AND Host='localhost';

Sample outputs:

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Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0

Feel free to replace the values for “tom” (user), “localhost” (hostname), and “foobar” (password) as per your requirements. Finally, type the following command to reload privileges:

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FLUSH PRIVILEGES;

Sample outputs:

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Query OK, 0 rows affected (0.00 sec)

To exit from mysql> prompt, enter:

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quit;

User or you can test new password using the following shell syntax:

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mysql -u tom -p

When promoted enter new password you set earlier for tom user.

Sample session

Fig.01: Mysql Updating / Changing password (click to enlarge)
Fig.01: Mysql Updating / Changing password (click to enlarge)