Puppy Linux Help & Forum

Alternate Forum for Puppy Linux Users | Go to Main Forum

1. Lobster
   Member

   Underdog is going to be available as part of woof2
   http://bkhome.org/blog/?viewDetailed=02668

   I have modified the 'init' script in the initramfs, in Woof, so this feature will be in the next Puppy built with latest Woof.

   I seem to remember something similar (I don't remember it as part of Underdog) that allowed me to create a 'tunnel' into Vector Linux on my HD, whilst using Puppy booting from CD.

   In effect it allowed the same effect: Run KDE and Vector Linux programs from the Puppy boot.
   I remember it was a few lines of code on the command line and may have been pre-Underdog.
   Maybe someone can remember or know how this is done in other distros?
   It was really amazing, Barry was using Vector Linux to compile with (one of the reasons I had it on my system) So it was pre dev-x

   I remember at the time it seemed very cool but it was a long time ago and we may not have been running the Murga forum, but I remember writing about it . . .
   possibly it was part of my news reports which have been archived somewhere
   If this is part of woof2 then theoretically it would run on ARM, meaning we could have access to another distro whilst offering the more efficient Puppy code for most usage . . .

   If this works in whatever form
   we can have our cake and everyone elses

   OK gonna see if I can find any details in the archives . . .

   Posted 1 year ago #

2. Lobster
   Member

   Ah it was Underdog [Egg on crustacean visage]
   - here is the code from 2006 from Tronkel
   - it is the 'touch' command that does the magic

   #!/bin/sh
#tronkel
#this little bash script when run from a terminal will start or remove underdog.
#system reboots after completion of script if "underdog.lnx" is present otherwise will simply #exit the shell. System will also reboot if "Start" option is selected

   string1="hda1"
select item in Start Remove
do
if [ $item = "Start" ];then
touch /mnt/home/underdog.lnx
echo $string1 >> /mnt/home/underdog.lnx
/usr/X11R7/bin/wmreboot
elif [ $item = "Remove" ];then
if [ ! -e /initrd/mnt/dev_save/underdog.lnx ];then
echo "underdog.lnx does not exist"
exit
else
rm /initrd/mnt/dev_save/underdog.lnx
echo "underdog removed"
/usr/X11R7/bin/wmreboot
fi
else
break
fi
done

   Posted 1 year ago #

3. koolie
   Member

   If it works with Debian and Slackware, you woudn't need much else.
   In some ways it would be better than a virtual machine.

   Do you think Barry could get this ready for the weekend?

   :)
   :)
   :)

   Posted 1 year ago #

4. Aitch
   Member

   Ha, it was some researching I was doing that led to the rediscovery of this bit of lost puppy magic

   I stumbled upon info about underdog, tronkel's post on the main forum, dated back to 2006, before I got into using puppy, and Barry picked up on it
   He gave a really useful link to a 'How puppy works' page, which I hadn't seen referenced before, also, which people may find useful, bearing in mind, that changes have been made

   The underdog bit: In the section on Architecture overview,

   What the above diagram is intended to convey is that the bottom layer is a partition, not the "underdog.lnx" file itself. File underdog.lnx is just a text file, containing the name of a partition, for example "hda1".
   At bootup Puppy will read underdog.lnx and will mount the partition as the bottom layer. If that partition happens to have a Linux distro installed in it, then the entire distro filesystem will "show through" on the top layer of Puppy's unionfs.

   It will look like a normal Puppy, running JWM window manager or whatever, same desktop, but everything in the underlying distro is available to be executed. All the applications, compile environment, package manager, etc.

   The actual underdog code, as used in early Puppy versions is shown in the Initial ramdisk section, where the code is listed for anyone wanting to try it,
   [though the usual caveats apply...don't blame me if you break something]

   see http://www.murga-linux.com/puppy/viewtopic.php?t=13750

   Aitch :)

   Posted 1 year ago #

5. Karl Godt
   Member

   It is difficult to understand the layer pictures the first several times if there are no holes for programs in them .

   http://en.wikipedia.org/wiki/Punched_card

   layered upon another NOT next to another would show it more clearly .

   Anyhow , can not think of why this feature got lost . Windows fs apparently .

   Did not knew it before .

   Maybe there might be problems with the partition sizes (large file capability) .

   Posted 1 year ago #

6. Aitch
   Member

   I've posted/linked in his blog asking Barry to clarify why he suggested removing it, if upgrading

   http://www.murga-linux.com/puppy/viewtopic.php?p=600692#600692

   ...I suspect it broke something and he may have forgotten, or intended to go back to it, but didn't
   That may explain why it wasn't asked about, post April 2006....?

   Aitch :)

   Posted 1 year ago #

7. 8-bit
   Member

   Ok, you have me trying to understand just how this would be different from say mounting the other OS and running the appplication you want from there.
   I already can mount other OSes that are installed and run the applications from the rox window for the mount. And that also includes applications on my NTFS partition containing windows as long as I have wine installed.
   So what is the big deal?
   Is it a matter of being able to run one of the other OSes applications during the boot process?

   Posted 1 year ago #

8. Ray MK
   Member

   I think the advantage for a n00b -
   is that if an "underdog" puppy is used on a partition containing AN-other distro (puppy or alien)
   its apps etc are not only usable but also show up in the "underdog" puppy menu.

   It is entirely possible - that I am speaking from the deepest depths of ignorance - but the above is my n00b understanding of the "underdog" feature.

   I also think that one can tell "underdog" which partition to read at bootup (UD=sdaX) or something similar. Very handy if one has many partitions containing a selection of distro's.

   So hopefully we can all look forward to the "underdog" putting one over the "big" dogs.
   Root - sudo - your choice via "underdog".

   Time to take my pills - best regards - Ray.

   Posted 1 year ago #

RSS feed for this topic

Reply

You must log in to post.