/usr/share/initramfs-tools/hooks/lupin_casper is in lupin-casper 0.55.
This file is owned by root:root, with mode 0o755.
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 | #! /bin/sh
set -e
PREREQ="casper"
prereqs () {
echo "$PREREQ"
}
case $1 in
prereqs)
prereqs
exit 0
;;
esac
cp -p /usr/share/initramfs-tools/scripts/lupin-helpers $DESTDIR/scripts/
exit 0
|