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What's the difference between the “group” and “group-” file?

I just changed a group name and noticed that

cat /etc/group

Includes the updated group name, but

cat /etc/group-

includes the old group name. How are the group and group- files different?

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marked as duplicate by enzotib, Takkat, Jorge Castro, htorque, jrg Feb 16 '12 at 1:53

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

yes it is a duplicate. –  Portablejim Nov 17 '11 at 8:26

1 Answer 1

up vote 2 down vote accepted

It is just a backup file that groupadd and similar programs use to store the previous state of the group file.

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