Post-install config script: Fix broken user group management.

diff --git a/jessie_start.sh b/jessie_start.sh
index a7fd7466cbf8838c3669aa984d5d42d88733a9ff..280c2df2af320ca3acbb63dd42e3305a0b1bba3f 100755 (executable)
--- a/jessie_start.sh
+++ b/jessie_start.sh
@@ -89,7 +89,7 @@ systemctl restart wicd
 echo 'HandleLidSwitch=hibernate' >> /etc/systemd/logind.conf
 
 # Set up sound.
-usermod -G audio plom
+usermod -aG audio plom
 apt-get -y install alsa-utils
 amixer -c 0 sset Master playback 100% unmute