In Unix, how do I find a user’s UID or GID?

In Unix, how do I find a user’s UID or GID?

To find a user’s UID or GID in Unix, use the id command. To find a specific user’s UID, at the Unix prompt, enter:

  id -u username

Replace username with the appropriate user’s username. To find a user’s GID, at the Unix prompt, enter:

  id -g username

If you wish to find out all the groups a user belongs to, instead enter:

  id -G username

If you wish to see the UID and all groups associated with a user, enter id without any options, as follows:

  id username

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