This file is indexed.

postinst is in rsh-redone-client 85-2+b1.

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

update-alternatives --install /usr/bin/rsh rsh /usr/bin/rsh-redone-rsh 150 \
	--slave /usr/share/man/man1/rsh.1.gz rsh.1.gz /usr/share/man/man1/rsh-redone-rsh.1.gz
update-alternatives --install /usr/bin/rlogin rlogin /usr/bin/rsh-redone-rlogin 150 \
	--slave /usr/share/man/man1/rlogin.1.gz rlogin.1.gz /usr/share/man/man1/rsh-redone-rlogin.1.gz