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I tried to install it on a Lenovo Ideapad 330s (Intel CPU, NVIDIA GPU, installing from USB created with UNetbootin from default file verified with the SHA hash). Any known fixes to this error? Thanks :)

Here is the error message (I tried to type it out, might have typos):

Installation Failed

External command finished with errors.

Command apt-get update finished with exit code 100. 
Output: 
Ign:1 cdrom://Ubuntu-Studio 20.10 _Groovy Gorilla_ -Release amd64 (20201022) bionic InRelease 
Ign:2 cdrom://Ubuntu-Studio 20.10 _Groovy Gorilla_ -Release amd64 (20201022) groovy InRelease 
Err:3  cdrom://Ubuntu-Studio 20.10 _Groovy Gorilla_ -Release amd64 (20201022) bionic Release 
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs 
Hit:4  cdrom://Ubuntu-Studio 20.10 _Groovy Gorilla_ -Release amd64 (20201022) groovy Release 
Reading package lists… 
E: The repository ‘cdrom://Ubuntu-Studio 20.10 _Groovy Gorilla_ -Release amd64 (20201022) bionic Release’ does not have a Release file.
karel
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qtamo
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  • Commenting out the lines with "cdrom" in /etc/apt/sources.list before attempting installation did not fix this – qtamo Dec 01 '20 at 16:51
  • `grep -r deb /etc/apt/sources.list /etc/apt/sources.list.d/` add it to your question please. – nobody Dec 02 '20 at 12:26
  • Sorry, I already overwrote that USB (installed Kubuntu+Ubuntu Studio installer instead, which works). There was 5 lines in the sources.list file, two with "cdrom" in them (groovy multiverse and bionic main restricted or something like that), and three others without "cdrom" (all were something Universe or something like that). – qtamo Dec 02 '20 at 19:33
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    Does this answer your question? [Problem with sudo apt get update: The repository cdrom... does not have a Release file](https://askubuntu.com/questions/776721/problem-with-sudo-apt-get-update-the-repository-cdrom-does-not-have-a-releas) – karel Apr 03 '22 at 11:52

1 Answers1

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Go to Software and Updates Software and Updates

In the Ubuntu Software tab, look for the cdrom, if it’s checked, uncheck it. Ubuntu Software tab

Now, open up a terminal and open the file sources.list using

nano /etc/apt/sources.list

If you find a line starting with cdrom, then comment it by putting # like this #deb cdrom:....

Press Ctrl x, y and Enter to save.

Finally, run the command

sudo apt update
Tejas Lotlikar
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  • Thanks for the suggestion! However, doing this before the installation attempt not work, even the error message during installation of Ubuntu Studio didn't change. – qtamo Dec 01 '20 at 20:50