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I changed my default python version from 3.7 to 3.10 with update-alternatives now my Ubuntu 22.04 don't run :). I tried with boot-repair from live cd with no success. Is it possible to fix this without reinstalling ubuntu? Thank you.

Here is the report of boot repair, I don't know if it will be useful: https://paste.ubuntu.com/p/k9ZC87Z3MN/

Dimitar Terzov
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    Your question actually confuses me; I gather you're on Ubuntu 22.04 LTS, which has the default python3 version of 3.10; but you changed it to 3.10?? (3.10.4-0ubuntu2 is the initial version found on original 22.04 media; being later for 22.04.1 etc). You didn't state if you're using Ubuntu Desktop (or Ubuntu Server) but the Desktop systems are very reliant on python3 being default. Text terminal features should still work though to revert your changes, but you can re-install Ubuntu Desktop without loss of files/data if you don't format (ensure you have good backups anyway). – guiverc Jan 02 '23 at 01:00
  • @user535733 Yes, finally I destroyed it :). This command saved me: sudo apt-get install ubuntu-desktop – Dimitar Terzov Jan 02 '23 at 09:29
  • @guiverc I was confused, too. I have python 3.7 in /usr/local/bin and python 3.7, 3.10, 3.11 in /usr/bin on Ubuntu Desktop. When I start python3 from terminal it runs 3.7. I wanted to have easy way to switch versions in terminal. I tried with update-alternatives and give privelige to 3.10. I saw that Livepatch crashed but ignored it, then I logged out and this was the end. – Dimitar Terzov Jan 02 '23 at 09:37

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