Re: Questions after doing update and upgrade on Stretch

[Richard Owlett <rowlett@cloud85.net>]

On 05/21/2017 09:31 AM, Dejan Jocic wrote:
> On 21-05-17, Richard Owlett wrote:
> > [snip]
> >
> > My questions:
> >
> > 1. In the first run, I don't understand:
> >      Processing triggers for initramfs-tools (0.130) ...
> >      update-initramfs: Generating /boot/initrd.img-4.9.0-2-686-pae
> >      I: The initramfs will attempt to resume from /dev/sda5
> >      I: (UUID=5d0c821b-26b2-4d38-b7fe-dc7db1b72576)
> >      I: Set the RESUME variable to override this.
> >  As /dev/sda5 is my SWAP.
> >
> > 2. I don't understand any implications of:
> >      The following packages have been kept back:
> >        linux-image-686-pae xorg xserver-xorg
> >
> > TIA
> As for number 1 can't say much about it, I do not get it either. But 2
> happens because you've used apt-get upgrade instead of apt-get
> dist-upgrade. Packages that will uninstall some packages already
> installed on your system and that will change some dependencies
> require dist-upgrade. It happens always in case of linux-image packages.
> It will leave your previous working linux-image on though, but will
> uninstall one older than that, so you will always end up with chance
> to  boot in working kernel, if new one messes up some things.

If I had problems after doing apt-get dist-upgrade,
  1. how would I distinguish a kernel problem from other problems?
  2. how would I boot with the previous kernel?
  3. is there some specific documentation I should be reading?

I've done online upgrades before having relied on purchased DVD sets of 
point releases due to bandwidth constraints.

Thank you.