How to check other user's id?

To check another user's ID in Linux, you can use the id command followed by the username of the user you want to query. Here’s how to do it:

Command Syntax

id username

Example

For instance, if you want to check the ID of a user named alice, you would run:

id alice

Expected Output

The output will look something like this:

uid=1001(alice) gid=1001(alice) groups=1001(alice),27(sudo)

• uid: This shows the User ID for alice.
• gid: This indicates her primary Group ID.
• groups: This lists all the groups that alice is a member of.

Notes

• You need to have the necessary permissions to view another user's information. Typically, you can check any user's ID unless restricted by system policies.
• If the user does not exist, you will receive an error message indicating that the user could not be found.

Feel free to ask if you have any more questions!