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I am trying to debug some ubuntu installation issues from a customized ISO using the source image for ubuntu server 18.04 here: http://releases.ubuntu.com/18.04.2/ubuntu-18.04.2-live-server-amd64.iso (I am doing the customization similar to how Cubic is done).

When I run the installation after my customization and repackaging, I am selecting the first option 'Install Ubuntu Server' and proceed with a text based installer.

My question: What is the name of this CLI based installer?

I have run across Ubuiquity, Subiquity, curtin and debian installer names while doing searches for the issue I am trying to chase down, and I basically want to find this installer's name and source to continue troubleshooting.

Bonus: I would love a link to this installer's source.

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  • The screenshot you have posted does not show the UI used by the live server ISO. This is how the live server's installer UI looks: i.stack.imgur.com/rHkfj.png What you've shown is debian-installer with (IIRC) the newt frontend, used by (non-live) server, netinst and minimal ISOs. Please clarify what you're actually using.
    – muru
    May 15, 2019 at 3:57
  • @muru Thanks, I removed the screenshot to avoid confusing people. You have helped me clear up my misunderstanding.
    – 111---
    May 15, 2019 at 12:55

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That ISO ("live-server") uses Subiquity, as the Release Notes state:

Server installer

The next generation Subiquity server installer, brings the comfortable live session and speedy install of Ubuntu Desktop to server users at last.

The source code is also linked to by the Release Notes: https://github.com/CanonicalLtd/subiquity

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