TOSS 5 duplicate User IDs (UIDs) must not exist for interactive users.

To ensure accountability and prevent unauthenticated access, interactive users must be identified and authenticated to prevent potential misuse and compromise of the system.

Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000121-GPOS-00062

Verify TOSS 5 contains no duplicate UIDs for interactive users using the following command:

$ sudo awk -F ":" 'list[$3]++{print $1, $3}' /etc/passwd 

If output is produced and the accounts listed are interactive user accounts, this is a finding.

Edit the file "/etc/passwd" and provide each interactive user account that has a duplicate UID with a unique UID.