On Fri, Jan 08, 2021 at 05:20:36PM +0100, Rudolf Sykora wrote: > > Todd C. Miller <[email protected]> writes: > > > You need to login in again. Logging in via ssh, a virtual console, > > X11 or running su will set the groups list. Setting groups is a > > privileged operation so simply starting a new shell or opening a > > new xterm is not sufficient. > > Thanks, su helped. > (Although I do not understand the reasoning behind the need to log > out/in, i.e., why isn't the group membership just updated after the > usermod command...)
Todd's message contains the explanation. If you did not understand it, please do some homework, like, read up on and understand how processes work on Unix.
