prerm is in ifplugd 0.28-19ubuntu1.
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 | #!/bin/sh
set -e
DEFAULTFILE=/etc/default/ifplugd
INTERFACES=""
HOTPLUG_INTERFACES=""
if [ -x "/etc/init.d/ifplugd" ] && [ "$1" = remove ]; then
	if [ -s "$DEFAULTFILE" ]; then
		. $DEFAULTFILE
	fi
	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
		invoke-rc.d ifplugd stop $INTERFACES $HOTPLUG_INTERFACES
	else
		/etc/init.d/ifplugd stop $INTERFACES $HOTPLUG_INTERFACES
	fi
fi
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