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How to make a quick shot before upgrade the system? so I can roll back quickly if met some errors which are so hard to resolve.

Just like the behaviour in VMware.

Fangzhen Song
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  • If using btrfs you can rollback changes, eg. refer https://askubuntu.com/questions/1033990/howto-rollback-failed-release-upgrade – guiverc Jun 25 '21 at 10:37

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The safest way (I am familiar with) to have a backup installation, in case anything breaks, is to use something like Clonezilla to backup your installation.

It is very easy to use, you only need a suitable place for your backed up information.

Or you could try TimeShift. Or BackInTime.

There are quite a few posts out there with variants.

  1. Create bootable backup of my existing ubuntu installation
  2. https://superuser.com/questions/355212/how-can-i-backup-a-ubuntu-system-and-restore-it-on-another-maching-with-complete
  3. https://ubuntuforums.org/showthread.php?t=2244774 (old)
sancho.s ReinstateMonicaCellio
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