==screen=.oO(theorem@topgun ~) id
uid=1000(theorem) gid=100(users) groups=11(floppy),17(audio),18(video),19(cdrom),100(users)
==screen=.oO(theorem@topgun ~) sudo groupadd usbstick
groupadd: group usbstick exists
==screen=.oO(theorem@topgun ~) sudo usermod -G usbstick theorem
==screen=.oO(theorem@topgun ~) id
uid=1000(theorem) gid=100(users) groups=11(floppy),17(audio),18(video),19(cdrom),100(users)