0

What my problem is

I can't install updates or any new package from ubuntu repositories. The package list seems to only contain already installed packages, e.g.

$ apt-cache policy bash
bash:
  Installed: 5.0-4ubuntu1
  Candidate: 5.0-4ubuntu1
  Version table:
 *** 5.0-4ubuntu1 100
        100 /var/lib/dpkg/status
$ apt search curl
Sorting... Done
Full Text Search... Done
curl/now 7.65.3-1ubuntu3 arm64 [installed,local]
  command line tool for transferring data with URL syntax

libcurl3-gnutls/now 7.65.3-1ubuntu3 arm64 [installed,local]
  easy-to-use client-side URL transfer library (GnuTLS flavour)

libcurl4/now 7.65.3-1ubuntu3 arm64 [installed,local]
  easy-to-use client-side URL transfer library (OpenSSL flavour)

I expected apt-cache policy to display a line like

500 http://ports.ubuntu.com/ubuntu-ports eoan/main arm64 Packages

like on any other ubuntu. The apt search command should have output a long list of packages.

What I did before this happened

I downloaded the preinstalled 19.10 image today from http://cdimage.ubuntu.com/releases/eoan/release/ubuntu-19.10-preinstalled-server-arm64+raspi3.img.xz and dded it on a SD card and booted a raspberry pi 4b from it. The device boots fine. I then wanted to do a dist-upgrade as I normally do after installing an ubuntu system from some image.

apt update seems to have run without any serious issue:

$ sudo apt update
Hit:1 http://ports.ubuntu.com/ubuntu-ports eoan InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports eoan-updates InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports eoan-backports InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports eoan-security InRelease
WARNING:root:cannot read /var/lib/command-not-found/commands.db.metadata: Expecting value: line 1 column 1 (char 0)
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.

That warning seemed a bit strange, but went away when running apt update again.

Immediately after that I ran

$ sudo apt upgrade 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

That was the first indication that something was strange as normally those images are not completely up to date.

What I tried to solve this

I tried these commands a couple times, rebooted the system after doing a couple other changes (setting hostname, adding kernel parameters to bootloader). Still no packages.

I then added another repository to apt which works completely fine. I can find packages in it and install them. No problem at all.

But trying to install the packages nfs-common and docker.io, those could not be found.

I looked for the package list files in /var/cache/apt/list but could not find that directory. On a working 18.04 armhf system that directory is missing, too, so this seems to be ok. There is instead a file /var/cache/apt/pkgcache.bin which I tried to remove (sudo rm /var/cache/apt/pkgcache.bin), but after apt update the problem remains.

Further useful information

My /etc/apt/sources.list (comments removed for brevity):

deb http://ports.ubuntu.com/ubuntu-ports eoan main restricted
deb http://ports.ubuntu.com/ubuntu-ports eoan-updates main restricted

deb http://ports.ubuntu.com/ubuntu-ports eoan universe
deb http://ports.ubuntu.com/ubuntu-ports eoan-updates universe

deb http://ports.ubuntu.com/ubuntu-ports eoan multiverse
deb http://ports.ubuntu.com/ubuntu-ports eoan-updates multiverse

deb http://ports.ubuntu.com/ubuntu-ports eoan-backports main restricted universe multiverse

deb http://ports.ubuntu.com/ubuntu-ports eoan-security main restricted
deb http://ports.ubuntu.com/ubuntu-ports eoan-security universe
deb http://ports.ubuntu.com/ubuntu-ports eoan-security multiverse

/etc/apt/sources.list.d is empty. It is the original file from the image, I didn't modify it.

I am at a loss here, out of ideas how to debug this further. Does anyone of you have an idea what went wrong on that system?

  • ls -al /etc/apt | grep source updating your package source is interrupted. – nobody Nov 3 at 9:01
1

Not sure why this happened, but I had exactly the same problem. The solution for me was to comment the universe/multiverse entries out of /etc/apt/sources.list and then run apt-get purge and apt-get clean. After than, I ran apt-add-repository universe and apt-add-repository multiverse, and that did the trick.

  • Thank you a lot! This did the trick. I still don't know what exactly happened, but after commenting all ubuntu mirror lines from /etc/apt/sources.list, doing apt-get purge and apt-get clean and apt-get update (not sure which of those are really relevant) I still had the same problem. But after adding those lines again and doing apt-get update I got a bunch of updates to install. – Lienhart Woitok Nov 3 at 11:32

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.