This file is indexed.

postinst is in plymouth-theme-edubuntu 14.03.1.

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.

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#! /bin/sh
set -e

case "$1" in
    configure)
        # Add plymouth themes
        update-alternatives \
            --install /lib/plymouth/themes/default.plymouth default.plymouth \
            /lib/plymouth/themes/edubuntu-logo/edubuntu-logo.plymouth 150
        update-alternatives \
                --install /lib/plymouth/themes/text.plymouth text.plymouth \
                /lib/plymouth/themes/edubuntu-text/edubuntu-text.plymouth 60

        if which update-initramfs >/dev/null 2>&1
        then
            update-initramfs -u
        fi
    ;;

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

    *)
        echo "$0 called with unknown argument \`$1'" 1>&2
        exit 1
    ;;
esac