Question

3

Is there any record of group membership changes?

rated 0 times [ 3] [ 0] / answers: 1 / hits: 668 / 1 Year ago, sun, february 12, 2023, 8:35:45

I followed bad instructions and left the -a out of:

usermod -a -G wireshark ak

Now all of my groups have been lost, including sudo permissions:

$ groups

ak wireshark

If I understand correctly, I should be able to fix this by booting to the recovery option in GRUB, but I'm not sure what groups need to be added back.

Where can I check to find out what groups I used to be in?

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ligenvirt

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answered 1 Year ago skipu · Accepted Answer

In a standard Ubuntu installation there's a groups config backup file in /var/backups/group.bak. So (from a root recovery console) you could do something like

grep <your_username> /var/backups/group.bak

to list all groups you used to be in.

EDIT: as Lekensteyn rightly pointed out, it would be better to use the /etc/group- backup file, not the /var/backups/group.bak one.