postinst is in focalinux-html 2010-09-3.
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 | #!/bin/sh -e
if [ "$1" = "configure" ]; then
        if [ -d /usr/doc -a -h /usr/doc/focalinux-html -a -d /usr/share/doc/focalinux-html ]; then
                rm -f /usr/doc/focalinux-html
        fi
fi
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