Apart from the fact that nobody mentions that the
inetrmezzo group has to exist in /etc/groups for
mkizofs to start up, the test it has is too strict.
No, I do NOT use shadow passwords:
EXCLUDE_GID=`sed -n -e "s/^intermezzo❌\([0-9]*\):/\1/gp" /etc/group`
The "x" should be something much more liberal and
this stuff should be in the HOWTO.