Changing the password of an (unprivileged) MySQL user is very simple in principal, but most of the methods I have seen in blog posts etc. are not simple and complete at the same time. This is what I generally do:
[user@host:~/website] 13:00:11 $ mysql -u databaseuser -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 56805 Server version: 5.5.24-0ubuntu0.12.04.1 (Ubuntu) Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> SET PASSWORD FOR 'databaseuser'@'localhost'=PASSWORD('new_password'); Query OK, 0 rows affected (0.03 sec) Ctrl-C
mysql -u databaseuser -p logs in into the MySQL system as the unprivileged user
databaseuser using password authentication. The user has permission to change its own password, so this is what I do. A subsequent
FLUSH PRIVILEGES; is often recommended and requires administrator privileges. My
databaseuser does not have them, so I can not invoke this command. As it turns out, it is not necessary: the password change takes effect immediately (at least for my small setup).