What are the advantages for updating so often?
5 Answers
Here is a list why packages (so including the kernel) got updated: https://www.ubuntuupdates.org/
- Version: 3.5.0-22.34 2013-01-08 23:19:18 UTC
- Version: 3.5.0-22.33 2013-01-02 23:08:48 UTC
- Version: 3.5.0-21.32 2012-12-11 21:08:43 UTC
- Version: 3.5.0-20.31 2012-12-05 15:08:46 UTC
- Version: 3.5.0-19.30 2012-11-13 19:08:30 UTC
All include a long list of fixes so the best answer to me seems: those kernel bug fixers have been doing a lot of work so there have been more moments to offer a kernel upgrade.
It might have something to do with the kenelversion 3.5.0. This was a big update so it will include a bit more bugs where some might be easy to fix.
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@JonathanLeaders not really a reason for a downvote. if you see something like that PM me and Ill edit it or you are free to edit any answer to update it (you can use those edits because they add towards a badge; downvoting does not).– RinzwindApr 6, 2017 at 18:00
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The main reason is to provide fixes to security flaws that get discovered, fix stability bugs, and provide updated hardware support.
Some notes about kernel updates:
Because the running kernel is kept loaded in memory, it possible to keep working indefinitely without rebooting after a kernel update. This will continue running the old kernel. Of course, you will then remain vulnerable to any security issues fixed in the update until you reboot. If you are just using a low-security workstation and you're in the middle of something, that risk may be acceptable. Consider reading the changelog for the update to see whether it contains security fixes for flaws that may affect you.
Ksplice is a kernel extension that allows the running kernel to be updated in memory, without rebooting. This is useful for servers for which downtime (disruptions when rebooting) is costly.
Kernel updates tend to add new features and drivers as well as fixing problems on the old one's and a few bug fixes along the way... It's beneficial to update your kernel although you dont HAVE to...
Frequent updates may not always be an advantage but as far as security goes, it is. If some kind of weakness is found in the kernel it could potentially be used to compromise the system until it is fixed. So it's best if as little time as possible passes from the discovery of a security hole until it's been fixed. There's really no reason to wait and leave an open security hole while there's a perfectly good fix available.
It's good to always have the latest kernel. Even if there's no security problem, an update might fix a bug or improve stability. And of course, new features are nice.
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Most kernel upgrade won't include any new feature... especially on a server install. Oct 11, 2014 at 8:39
All code has bugs. So does linux kernel code. Kernel updates fix kernel bugs early, before there is a zero-day exploit.
If you update, you are a moving target for an attacker. If you update on time, you move faster than any anyone can point. This makes you more or less safe from viruses and trojans.
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9An exploit is zero day if it's used in the wild first, and not discovered before that. So by definition, patches cannot prevent zero-day exploits. Jan 18, 2013 at 22:58
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1@EliahKagan I don't see the issue here. If a bug is fixed before it is discovered by some malicious user, then you cannot have a zero-day exploit using that bug.– howardJan 19, 2013 at 23:28
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1@howardh If the bug is discovered by someone other than the person who exploits it, it is by definition not a zero day bug, and an exploit for it (even if released before the bug is ever fixed anywhere) is not a zero day exploit. Jan 20, 2013 at 2:18