Unable to upgrade Ubuntu 20.04 to 21.04 (GUI does not launch, nothing on terminal)

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Answer: 1

5 hours ago

I tried to upgrade from Ubuntu 20.04 to 21.04 but it did not work. I first ran the following:

sudo apt update
sudo apt dist-upgrade
sudo shutdown -r now

after restarting, I still had 20.04. I tried manually from Software & updates, it shows an upgrade available

enter image description here

but when I press OK, no other windows show up. On terminal I got:

$ sudo apt update
Hit:1 https://download.docker.com/linux/ubuntu focal InRelease
Hit:2 http://ppa.launchpad.net/alexlarsson/flatpak/ubuntu focal InRelease      
Hit:3 http://de.archive.ubuntu.com/ubuntu focal InRelease                      
Hit:4 http://dl.google.com/linux/chrome/deb stable InRelease                   
Hit:5 https://linux.teamviewer.com/deb stable InRelease                        
Hit:6 http://ppa.launchpad.net/eugenesan/ppa/ubuntu focal InRelease            
Get:7 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]     
Hit:9 https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/ InRelease     
Hit:10 http://ppa.launchpad.net/libreoffice/ppa/ubuntu focal InRelease         
Hit:11 https://packages.microsoft.com/repos/ms-teams stable InRelease          
Hit:12 http://security.ubuntu.com/ubuntu focal-security InRelease              
Hit:13 http://ppa.launchpad.net/linuxuprising/java/ubuntu focal InRelease      
Get:14 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]  
Hit:15 http://apt.insync.io/ubuntu focal InRelease                             
Hit:16 http://ppa.launchpad.net/smathot/cogscinl/ubuntu focal InRelease        
Hit:17 https://linux-clients.seafile.com/seafile-deb/focal stable InRelease    
Hit:8 https://github.com/retorquere/zotero-deb/releases/download/apt-get ./ InRelease
Fetched 214 kB in 3s (68.1 kB/s)
Reading package lists... Done
Building dependency tree       
Reading state information... Done
5 packages can be upgraded. Run 'apt list --upgradable' to see them.
$ apt list --upgradable
Listing... Done
libboost-date-time-dev/focal 1.71.0.0ubuntu2 amd64 [upgradable from: 1.67.0.2]
libboost-filesystem-dev/focal 1.71.0.0ubuntu2 amd64 [upgradable from: 1.67.0.2]
libboost-iostreams-dev/focal 1.71.0.0ubuntu2 amd64 [upgradable from: 1.67.0.2]
libboost-program-options-dev/focal 1.71.0.0ubuntu2 amd64 [upgradable from: 1.67.0.2]
libboost-system-dev/focal 1.71.0.0ubuntu2 amd64 [upgradable from: 1.67.0.2]
$ sudo apt upgrade libboost-system-dev/focal
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Selected version '1.71.0.0ubuntu2' (Ubuntu:20.04/focal [amd64]) for 'libboost-system-dev'
Calculating upgrade... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
 libboost-system-dev : Depends: libboost-system1.71-dev but it is not going to be installed
E: Broken packages
$ sudo apt upgrade libboost-system-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
 libboost-system-dev : Depends: libboost-system1.71-dev but it is not going to be installed
E: Broken packages
$ do-release-upgrade
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.

What could be the problem and how can I solve it? Shall I remove these files that are still pending? What command shall I use?

Thank you

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