postrm is in nut-cgi 2.6.3-1ubuntu1.1.
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 43 | #!/bin/sh -e
case "$1" in
  remove)
    # remove sample file if those were previously (wrongly) installed
    for file in upsset.conf hosts.conf upsstats.html upsstats-single.html ; do
      if [ -f /etc/nut/${file}.sample ] ; then
        rm -f /etc/nut/${file}.sample
      fi
    done
    ;;
  purge)
    # do nothing
    ;;
  upgrade)
    # do nothing
    ;;
  failed-upgrade)
    # do nothing
    ;;
  abort-install)
    # do nothing
    ;;
  abort-upgrade)
    # do nothing
    ;;
  disappear)
    # do nothing
    ;;
  *)
    echo "$0: incorrect arguments: $*" >&2
    exit 1
    ;;
esac
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