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I want to display:

  1. All users and

  2. All groups

    in my system using command-line.

users and groups commands display users currently logged in, and groups a user belongs to respectively.

How to display a list of all users and all groups by command-line?

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2 Answers 2

288

You can display with the help of compgen builtin command as follows:

  1. To display all users run following command:

    compgen -u
    
  2. To display all groups run following command:

    compgen -g
    

However you can also display all users by cut -d ":" -f 1 /etc/passwd.

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  • 17
    Nice! it might be preferable to use getent passwd / getent group instead of cat'ing the local files (getent should work for non-local accounts as well) Aug 23, 2014 at 14:31
  • @steeldriver compgen does seem to work for non-local accounts (at least for LDAP).
    – muru
    Aug 23, 2014 at 14:32
  • 1
    @muru I was referring to the second method specifically (cat /etc/passwd | cut -d ...) Aug 23, 2014 at 14:46
  • @steeldriver Ah, sorry. I thought that was a more general observation.
    – muru
    Aug 23, 2014 at 14:57
  • Well, on my ubuntu, I have some files created by docker mount with 999:999 as user:group, but unfortunately none of the above commands prints them.
    – Marinos An
    Mar 19, 2019 at 11:31
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Here we are going to use getent for the detailed the info

We can list the user with the following command:

getent passwd

We can list the group as follows:

getent group

To fetch detail a specific user

getent passwd lalit

Replace the lalit with your user name. Lalit will not be in every system :)

You can read the more into about getent here

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