This file is indexed.

postinst is in debianutils 4.7.

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.

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#! /bin/sh -e

if test -z "$2" && test ! -f /etc/shells
then
        cp -p /usr/share/debianutils/shells /etc/shells
fi

case "$1" in
    configure)
    if which update-mime >/dev/null;
    then
	    update-mime
    fi
    if [ ! -e /usr/bin/which ]
    then
	    ln -s /bin/which /usr/bin/which
    fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)

    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac