dpkg-reconfigure -fnoninteractive resolvconf
# default jessie groups + kvm, systemd-journal, adm
-usermod -aG adm,cdrom,floppy,sudo,audio,dip,video,plugdev,netdev iank
+for g in adm cdrom floppy sudo audio dip video plugdev netdev; do
+ if getent gropu $g >/dev/null; then
+ usermod -aG $g iank
+ fi
+done
if getent group systemd-journal >/dev/null; then
usermod -aG systemd-journal iank