Because updating the kernel requires to reboot the system -AFAIK- in many cases I would prefer to 'dist-upgrade' (all packages) except the kernel -until a moment in which I can reboot the system-, so:
1. Is this something right/viable/acceptable to do? 2. Which would be the best/proper way to do it? (I mean, 'apt-get update && apt-get dist-upgrade' for all packages *except* the kernel.) 3. If 'apt-mark hold package' would be the way to do it: which 'package' -exactly- should I mark for hold? Thanks a lot!