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6.2.6 Ensure no duplicate GIDs exist

Audit#

Run the following script and verify no results are returned: 

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#!/bin/bash
cut -d: -f3 /etc/group | sort | uniq -d | while read x ; do
 echo "Duplicate GID ($x) in /etc/group"
done

Remediation#

Based on the results of the audit script, establish unique GIDs and review all files owned by the shared GID to determine which group they are supposed to belong to.