prerm is in ubuntu-cloud-keyring 2012.08.14.
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 | #!/bin/sh
set -e
CLOUD_KEY="EC4926EA"
case "$1" in
remove|purge)
if [ -x /usr/bin/apt-key ]; then
apt-key del "$CLOUD_KEY"
fi
;;
upgrade|deconfigure)
;;
failed-upgrade)
;;
*)
echo "prerm called with unknown argument \`$1'" >&2
exit 1
;;
esac
exit 0
|