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I added a user user01 to a group group01 using: usermod -a -G group01 user01

When I run in command id user01 it shows that this user has actually been added to the group.

However, the file /etc/group doesn't reflect this. i.e. I believe that on this file, users that belong to each of the groups should be listed next to it. Please correct me if I am wrong.

This is a fresh installation of CentOS 6.4

Also, since id user01 shows that this is updated, is there any way to check all the members of group group01?

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1 Answer 1

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If you run getent group group01 you should see a list of all members of that group.

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Thanks @John. The command works and I am able to see the users in this group using this. Do you know if /etc/group/ is supposed to be automatically updated with the list of members? And if so, any reason why it would not update? Thanks for your help! –  slayernoah Nov 7 '13 at 15:56
Updating /etc/group is one way of recording new group memberships. I'm not really sure if this is supposed to happen automatically or not. I'd need to know a lot more about your environment before I could really have any idea where to look next. –  John Nov 7 '13 at 16:00
I just installed a fresh copy of CentOS and I am only using this to familiarize myself with linux. I just created groups and assigned memberships without directly writing to the /etc/group file. Not sure why the file doesn't update when I do so.. –  slayernoah Nov 7 '13 at 16:02

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