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Additionally, other functions may have also changed.
You most likely won’t break your system if you don’t update your kernel for this exact reason, but sooner or later you’ll find programs and other packages that require a certain version of the kernel.
It’s best to have the latest one so you know you won’t come across that issue.
Last but not least, many major updates to the kernel improve the overall speed of the system.
This define is used by libdnf to detect whether to ask libsolv and librepo to attempt to use zchunk (libdnf doesn’t actually use zchunk itself).
The problem is that RHEL 8’s librepo had this defined, but didn’t actually have zchunk enabled, which caused Bad Things To Happen™.
If a hacker manages to get into the kernel, a lot of damage can be done or the system simply crashes.
I’m not sure how many have noticed, but DNF hasn’t been downloading zchunk metadata in Fedora since the beginning of this month due to a bug in… And, when that happens, almost nobody will notice (but their metadata downloads will be greatly reduced in size again) Back in July, a bug was found in RHEL 8 that caused a crash if zchunk-enabled repos were found.For example, you could take the kernel, patch it up with lots of fixes, tweak other settings, strip out everything you won’t need, and then replace your original kernel with your final product, and it will run just fine (assuming it was done right).Being able to simply replace a part with something else without issue is what makes Linux great.While some changes can be very subtle, others aren’t and can make a big difference, such as the famed 200-line patch that increased the overall productivity of a Linux machine by quite a bit.There are even some crazier changes such as this, where Linux can run off of zero CPU cores.