+# newer aptitude versions won't remove essential packages using
+# 'aptitude -f -y install file-rc' anymore, therefore force it:
+$ROOTCMD aptitude -o Aptitude::ProblemResolver::Keep-All-Tier=60000 -f -y install file-rc
+
+# get rid of insserv:
+if $ROOTCMD dpkg --list insserv 2>/dev/null | grep -q '^ii' ; then
+ $ROOTCMD apt-get -y --purge remove insserv
+fi