adding group with usergroup in Debian 10 doesn't seem to work

Question

I'm trying to add a user to a group but it doesn't seem to work:

sudo usermod -a -G wireshark nicolas

But when I check my id, I get

uid=1000(nicolas) gid=1000(nicolas) groupes=1000(nicolas),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),109(netdev),112(bluetooth),115(scanner)

Or, simplier, groups

nicolas cdrom floppy audio dip video plugdev netdev bluetooth scanner

I checked that wireshark group existed with

$ sudo groupadd wireshark
groupadd: group 'wireshark' already exists

Has anyone got an idea? Thanks

It might just be a case that you have to log out and log back in again to see the changes. Assuming you're running the command as the user you're changing. — Ashley Miller, Mar 19 '21 at 10:16
No worries. I'll add my comment as an answer so you can mark this as solved. — Ashley Miller, Mar 22 '21 at 05:36

score 0 · Accepted Answer · answered Mar 22 '21 at 05:45

If you're currently logged in as the user you're modifying, make sure to log out and log back in again to see your updates.

For what it's worth, in the terminal you can also "switch" user to the same user with su <username>. (Although, that effectively nests a new login inside your current session, so if you exit you'll end up in your original, unmodified, session.)

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adding group with usergroup in Debian 10 doesn't seem to work

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