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Currently, I have Ubuntu 20.10. I am trying to update my OS to 21.04 using "sudo update-manager -d". but after entering the command, update-manager crashes without any errors, my screen only shows the following UIs

screen 1 screen 2 screen 3

After 3rd screen updater automatically closes

Milinda Kasun
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  • (1) Make sure your system is fully updated before starting and (2) check for and eventually disabled 3rd party repositories – ChanganAuto May 07 '21 at 16:03
  • before running "sudo update-manager -d" I have update the system using "sudo apt update && sudo apt upgrade". how can I check eventually disabled 3rd party repositories ? – Milinda Kasun May 07 '21 at 16:08
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    Try again with sudo apt full-upgrade instead and there's a typo in my previous comment: It should read "check for and eventually disable 3rd party repositories. You can open Software&Updates > Other software for that. Typically those don't prevent a release upgrade - the script just disables them - but on occasions software installed from and the repos themselves are what prevents a successful release upgrade. – ChanganAuto May 07 '21 at 16:12
  • I ran "sudo apt full-upgrade" and it shows no updates available, (0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.), My "Other Software" tab shows some application on there, but none of them are selected. Do I have to select any thing from there? – Milinda Kasun May 07 '21 at 16:20
  • Does this answer your question? Cannot update to Ubuntu 21.04 – user535733 May 07 '21 at 16:52
  • Do I have to select any thing from there? No, you unselect if selected. That said, it's quite weird to have "something" there (other then Partners) and have nothing selected. – ChanganAuto May 07 '21 at 17:47
  • @user535733 it is true that 21.04 is not available for 20.10 as default, But as I know it available as a force update, that is why I am using "sudo update-manager -d" command – Milinda Kasun May 08 '21 at 09:48
  • @ChanganAuto is there any other way for me to update my os to 21.04 ? – Milinda Kasun May 08 '21 at 09:51
  • Whenever the online upgrade fails, a fresh install is the best and fastest solution. – ChanganAuto May 08 '21 at 09:55
  • @ChanganAuto after some research i found that, my system has un removed PPAs, I was able to list them by following command, ''find /etc/apt/sources.list.d -type f -name "*.list" -print0 | while read -d $'\0' file; do awk -F/ '/deb / && /ppa.launchpad.net/ {print "sudo ppa-purge ppa:"$4"/"$5}' "$file"; done'' , but when I tried to remove them using ''sudo ppa-purge ppa:'' I got a error of ''Warning: Could not find package list for PPA: '' , How can I remove them? – Milinda Kasun May 14 '21 at 07:28
  • Maybe you can simply comment it out (#) or remove it if you want by editing /etc/apt/sources.list.d – ChanganAuto May 14 '21 at 12:06

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