199

The title says it all. What command I need to run from a terminal to find my user ID (UID)?

272

There are a couple of ways:

  1. Using the id command you can get the real and effective user and group IDs.

    id -u <username>
    

    If no username is supplied to id, it will default to the current user.

  2. Using the enviroment variable.

    echo $UID
    
| improve this answer | |
  • 6
    How about GID ? – kangear Oct 29 '15 at 1:11
  • 16
    @kangear id -g <username> – itsazzad Dec 18 '15 at 15:23
  • It's worth noting that, due to the fact that the variables are resolved before being passed to a command, we have that sudo echo ${UID} prints out 1000 (or whatever your sudoer user's UID is), whereas sudo id -u prints out 0. – AnthonyD973 Dec 19 '18 at 20:33
  • The username is optional, defaulting to yourself. Maybe square brackets would be better for indicating this, instead of angle brackets. – mwfearnley May 13 '19 at 15:44
65

Simply try

id

This will return your user ID, group ID, and all your groups.

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  • 10
    or id -u to see just the UID – steeldriver May 17 '14 at 13:21
  • Yepp. Prefer Jobin's answer, if you need to avoid parsing the output. – TAq May 17 '14 at 13:25
  • 3
    so much easier with id -u and id -g. Thanks. :) – thoroc Aug 3 '17 at 17:00
14

Try also :

getent passwd username

This will display user id , group id and home directory .

Or:

grep username /etc/passwd
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  • why to try long or alternative command while echo $UID and id -u is simple and exact according to question? – Pandya May 17 '14 at 13:37
  • 4
    thats right , but its good to know all options – nux May 17 '14 at 13:38
8

You can use id command.

Manpage

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