Why are there two users with same name?

Question

When I execute users command, it output two users with same name. Why are there two users? I'm pretty sure that I created just one user.

i.e

username@Computer:~$ users

gives following output

username username

Answer 1

The users command prints the user names of users currently logged in to the current host, not the list of users you created on your computer.

In your case, it returns the same user name twice because you are probably logged in twice.

You can check by using the who command (show who is logged on):

felix@computer:~$ who
felix    pts/0        2013-02-04 06:40 (:0.0)
felix    pts/5        2013-02-04 06:42 (:0.0)
felix@computer:~$ users
felix felix

See the manual pages for more information (man 1 users).