[Newbie] ubuntu's update-manager???

[David Armour]

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> On Wed, 2006-05-24 at 13:36 -0700, David Armour wrote:
>> why does the upgrade-manager require a re-boot 
>> on some mornings rather than others 
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> Some stuff on a Unix-like system can only be changed by rebooting. The
> prime example is the operating system kernel (i.e., linux as such). It
> runs in a special CPU mode, and you can't switch to a different kernel
> in a running system.
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> There are a few other things, but not many. In general, Debian-based
> systems like Ubuntu are especially good at updating running systems.
> Note however that forced reboots are much less frequent than in Windows.
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> Regarding your question about running multi-user systems. Such a system
> would not run a beta version, and as such would have less updates.
> Kernel updates for such a machine would only matter if security fixes
> arrive, or required features. Then the sysadmin simply must analyze
> his/her needs and make a trade-off decision. Any system that can not
> accept outages will have backup servers anyway.
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thank you for your reply. that clears things up considerably.