How can I get a list of user accounts using the command line in MySQL?

I’m using the MySQL command-line utility and can navigate through a database. Now I need to see a list of user accounts. How can I do this?

I’m using MySQL version 5.4.1.

1
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Use this query:

SELECT User FROM mysql.user;

Which will output a table like this:

+-------+
| User  |
+-------+
| root  |
+-------+
| user2 |
+-------+

As Matthew Scharley points out in the comments on this answer, you can group by the User column if you’d only like to see unique usernames.