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Debian Live CD as platform for debian-cd Jigdo download


on occasion of a user question on debian-cd
  "Blueray Disk image"
i exercised the whole procedure of Jigdo download by help of Debian LiveCD:


It is bumpy. (But at least there is a terminal starter icon.)
I Cc Luca Biella who initially asked the question. Maybe my ride helps him
with his endeavor and maybe he can report about his experience with Live CD
and MS-Windows hard disk.

As was already noticed by Rick Thomas in above thread, jigdo-lite is not
pre-installed. So the first step is to do:

  sudo apt-get update
  apt-get install jigdo-file

The "processing triggers" part lasted nearly a minute. (The system was booted
from an old 2 GB USB stick at USB-2. Reads with about 5 MB/s, writes with
about 3 MB/s.)

The filemanager mounted me the 230 GB partition of my olde test Lenny and
so i could learn its device address from command "mount".
Out of stubborn tradition i mounted it via sudo as /mnt/lenny and went
to its traditional DVD storage

  cd /mnt/lenny/dvdbuffer

Then i used the web browser (from starter icon) and Google "debian jigdo-bd"
to locate the download site. I copied the URL and ran


with input

Here i had to circumvent the allergy of jigdo-lite against https which
has been fixed in december by jigdo 0.7.3-5:
  * jigdo-lite: Cope with https URLs. Closes: #865864.
The installed jigdo-lite silently skips the attempt to download and then says
  File `https://cdimage.debian.org/debian-cd/current/amd64/jigdo-bd/debian-9.3.0-amd64-BD-1.jigdo' does not exist!

The workaround is simple. Fetch the files to simulate the situation after
an interrupted run (it is quite rugged with resuming):

  wget https://cdimage.debian.org/debian-cd/current/amd64/jigdo-bd/debian-9.3.0-amd64-BD-1.jigdo
  wget https://cdimage.debian.org/debian-cd/current/amd64/jigdo-bd/debian-9.3.0-amd64-BD-1.template

Now jigdo-lite gets to the question about "files" and mirrors. I used as

  <empty line>
Regrettably there is no overall progress indication. I could not even find
a network throughput monitor in the XFCE desktop. So i installed xosview.
Now it is fetching packages. 5.5 MB/s throughput. Sometimes long latency.
Sorry mirror. For once you have to stand my giant suckling.

Half an hour later, i stand in front of a screen locker and have to google
on my workstation for login and password

  "user" "live"

which works.
Ok. The download still runs. 
But since the template was already inflated to .iso.tmp with full image
size, i have few means to see how far it is. With 2.5 MB/s effectively it
should be done in barely 3 hours ...
2 hours 28 minutes later it is complete and the ISO is verified.

I run

  xfburn &

which recognizes the DVD burner and also that the BD image will not fit
on the inserted DVD+RW. Because i am too lazy to carry a BD burner to the
test machine i burn a smaller DVD image instead.
(If xfburn would for some reason not work with BD media:
   sudo apt-get install xorriso
   xorriso -as cdrecord -v dev=/dev/sr0 -eject debian-9.3.0-amd64-BD-1.iso


I deem it desirable that Debian Live gets advertised for this task.

The MS-Windows version of Jigdo download software is very old meanwhile
It lasted several hours yesterday until wget finally succeeded to connect
and to download it.
Further, at least debian-cd does not seem to have the experience to advise
about MS-Windows or MacOS. A Debian GNU/Linux based opportunity would be
much better supportable.

How about a wiki page to which the debian-cd Jigdo download pages could
point ?

- Maybe somebody with more XFCE experience could streamline my
  above method to get write access to a hard disk partition.
  One would have to test this with partitions of MS-Windows and MacOS.

- Some tangible advise should be given for the mirrors. E.g. to look at
  (I learned mine from entering "de" into the "mirror" question of
   jigdo-lite. So i got a list of .de mirrors. But that's quite rough
   for the normal GUI addict.)

- The best known version of jigdo-file/jigdo-lite should be pre-installed
  in DVD sized Live ISOs, unless Live suffers from extreme space shortage.

Opinions ? Wiki snippets ?

Have a nice day :)


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