[Bug 1892369] Re: Impossible to skip integrity test for ubuntu-server 20.04.1 iso

[Joe Breu]

We're in the process of installing 20.04 on machines at the end of a
very long VPN so the large ISO size is a real pain.  To work-around the
integrity check I cracked the ISO open and replaced md5sum.txt with my
own that covered just the autoinstall files I wanted to track.  I know
this isn't a permanent solution but it worked for us to remove up to 2
hours of re-installation time from our process.

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https://bugs.launchpad.net/bugs/1892369

Title:
  Impossible to skip integrity test for ubuntu-server 20.04.1 iso

Status in subiquity:
  Fix Released
Status in casper package in Ubuntu:
  Fix Released

Bug description:
  It is not possible to skip the integrity test with the iso available
  at http://www.releases.ubuntu.com/20.04/ubuntu-20.04.1-live-server-
  amd64.iso .

  Bellow is a screenshot of me hitting CTRL+C to try to cancel it, without success:
  https://ibb.co/vwvtXmn

  Checking integrity can be extremely slow when mounting an image via
  virtual CD tools from Dell idrac. I didn't measure it precisely but it
  takes more than 30 minutes.

  Since the image is on a remote location and was already checked, this
  is completely useless.

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