I am trying to install QGIS 3.12 Bucaresti on Ubuntu Focal Fossa following the steps here:


First, I have edited the sources.list adding the following repository and code name:

deb https://qgis.org/ubuntu/  focal main
deb-src https://qgis.org/ubuntu/ focal main

and the I have updated the packages:

sudo apt-get update

However, the update process hits an error

Reading package lists... Done
N: Skipping acquisition of configured file 'main/binary-i386/Packages', as repository 'https://qgis.org/ubuntu focal InRelease' doesn't support architecture 'i386'**

The thing is that I don't think I have a i386 architecture, indeed this is the output from

uname -a
5.4.0-21-generic #25-Ubuntu SMP Sat Mar 28 13:10:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

When I check the InRelease file from https://qgis.org/ubuntu/dists/focal/InRelease, the architecture supported is amd64. Which as far as I know from googling is the same as x86_64.

Someone knows what am I doing wrong?

  • I wouldn't advise going to far into the Ubuntu release schedule when working with QGIS. The LTR's of Ubuntu, Mint, etc. work best with the QGIS release schedule... Commented Apr 14, 2020 at 20:02
  • 3
    Does deb [ arch=amd64 ] https://qgis.org/ubuntu/ focal main work? I haven't tried. I would comment your next line about src if you don't need it.
    – etrimaille
    Commented Apr 15, 2020 at 7:17
  • thanks @etrimaille this fixed the issue about architecture mismatch! One little question, why would you comment the line with src? now I got another problem when installing. This package qtbase-abi-5-12-5, a dependency of qgis-providers package, seems not available, even if I have installed correctly libqt5core5a. I guess I am going to search about possible fixes now
    – 1ac0
    Commented Apr 15, 2020 at 8:04
  • I added my comment as answer, if you can vote for it. I'm not sure about your next error.
    – etrimaille
    Commented Apr 15, 2020 at 9:44
  • as a follow up to the problem about dependencies, today I was able to install qgis without problem. I guess the repository maintainers fixed the problem.
    – 1ac0
    Commented Apr 21, 2020 at 8:15

1 Answer 1


You can specify the platform in your APT line with [ arch=amd64 ]:

deb [ arch=amd64 ] https://qgis.org/ubuntu/ focal main

Source : https://unix.stackexchange.com/questions/272908/apt-looking-for-i386-files-even-though-architecture-is-amd64

You might need to add the key from the qgis.org server:

wget -O - https://qgis.org/downloads/qgis-2019.gpg.key | gpg --import gpg --fingerprint 51F523511C7028C3

Source : https://qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu

Side note, if you don't need the QGIS source code, you can comment the deb-src line.

Source : https://unix.stackexchange.com/questions/20504/the-difference-between-deb-versus-deb-src-in-sources-list

  • I followed up your answer but I got the issue that the repository is not signed. The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 51F523511C7028C3
    – Ragnar
    Commented May 27, 2020 at 12:23
  • 1
    wget -O - https://qgis.org/downloads/qgis-2019.gpg.key | gpg --import gpg --fingerprint 51F523511C7028C3 Source qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu
    – etrimaille
    Commented May 27, 2020 at 16:10

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