postrm is in postfix-cluebringer-webui 2.0.10-1ubuntu1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42  | #!/bin/sh -e
CONFIG_FILE="/etc/cluebringer/clubringer-webui.db.conf"
. /usr/share/debconf/confmodule
case "$1" in
	remove)
		;;
	purge)
		# Remove the config
		if [ -e $CONFIG_FILE ]; then 
			echo "Removing config files ... "
			# Remove the file
			rm -rf $CONFIG_FILE >/dev/null 2>&1 || true
			# Clean up UCF
			#ucf --purge $CONFIG_FILE >/dev/null 2>&1 || true
			#ucfr --purge postfix-cluebringer-webui $CONFIG_FILE >/dev/null 2>&1 || true
		fi
		
		# If we are the last vestage of cluebringer Remove user and group
		cluebringer_status=$(dpkg -l postfix-cluebringer | sed -n '$p' | awk '{print $1}')
		if ( [ "$cluebringer_status" != "ii" ] || [ "$cluebringer_status" != "ip" ] || [ "$cluebringer_status" != "iB" ] ); then
			if getent passwd cluebringer >/dev/null ; then
				echo "Removing cluebringer user and group ... "
				deluser --system cluebrunger >/dev/null 2>&1 || true
			fi
	
			if getent group cluebringer >/dev/null ; then
				delgroup --system cluebringer >/dev/null 2>&1 || true
			fi
		fi
		;;
	failed-upgrade|abort-install|abort-upgrade|upgrade|disappear)
		;;
	*)
		echo "Postrm called with unknown argment '$@'"
		exit 1;
		;;
esac
exit 0;
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