Re: Automatic creation of last-known-good boot configuration

[Dan Ritter <dsr@randomstring.org>]

Jens Schmidt wrote: 
> On Debian testing I've been bitten by the systemd upgrade and the
> systemd package split recently, rendering my dracut-LUKS-based
> system unbootable.  I know that my warranty is void since I'm on
> testing, but both these issues would have been much easier to cope
> with if there had been some good backup of my initramfs and kernel
> below /boot.
> 
> So I thought that there might be some automatism like this:
> 
>   If the currently used kernel and initramfs have been in use
>   already N times and if the boot time has been lower then M
>   minutes each time (and if some other conditions are fulfilled),
>   then consider that kernel and initramfs good and save them away
>   where they will not be overwritten by regular kernel/initramfs
>   maintenance.

Are you using grub as your bootloader? Normally apt upgrade
leaves the last N (N=5?) kernels and initramfs in /boot, and
configures grub to make them available. apt dist-upgrade, on the
other hand, tries to remove the oldest unused kernel and
initramfs each time.

-dsr-