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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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