Merge pull request #26617 from lujun9972/add-MjAyMjA3MjggSXQtcyBUaW1lIHRvIERpdGNoIDMyLUJpdCBMaW51eCBmb3IgNjQtQml0Lm1kCg==

自动选题[news]: 20220728 It’s Time to Ditch 32-Bit Linux for 64-Bit

sources/news/20220728 It-s Time to Ditch 32-Bit Linux for 64-Bit.md

@@ -0,0 +1,82 @@
+[#]: subject: "It’s Time to Ditch 32-Bit Linux for 64-Bit"
+[#]: via: "https://news.itsfoss.com/64-bit-linux/"
+[#]: author: "Ankush Das https://news.itsfoss.com/author/ankush/"
+[#]: collector: "lujun9972"
+[#]: translator: " "
+[#]: reviewer: " "
+[#]: publisher: " "
+[#]: url: " "
+
+It’s Time to Ditch 32-Bit Linux for 64-Bit
+======
+
+We have plenty of [Linux distributions tailored for 32-bit systems][1].
+
+So, why do I want to discourage using 32-bit and upgrade to 64-bit Linux instead?
+
+There are a couple of reasons, and one of the biggest reasons came to the spotlight this week.
+
+### 32-Bit: Ancient Hardware for E-Waste?
+
+Of course, Linux distros allow you to re-use older hardware, unlike any other operating system.
+
+You get the possibility to convert a system to a [media server][2], a storage server, and whatnot.
+
+Here, I’m not giving you the idea to contribute more e-waste. It is always good to utilize your hardware as long as possible without replacing them.
+
+However, the reasons not to use 32-bit systems may be more compelling than ever. The key highlight would be in terms of security and maintenance.
+
+### Improved Security With 64-bit Linux
+
+Spectre vulnerability made the buzz in 2018 as a dangerous security issue for processors. While it was fixed for Intel and AMD processors, it was not a pretty situation.
+
+Unfortunately, a new exploit, **Retbleed**, a variant of Spectre, is here affecting Intel and AMD chips.
+
+You can see it in action in the video below shared by the researchers who discovered it:
+
+![][3]
+
+So, naturally, we need appropriate measures to address a fix for this new security vulnerability.
+
+**Here comes the shocker**: 64-bit Linux kernels have received a fix for it to protect the necessary Intel/AMD processors in question. But, Linux 32-bit kernels remain vulnerable to Retbleed, as reported by [Phoronix][4].
+
+Pawan Gupta (Intel) responded to the concerns in the [kernel mailing list][5] by mentioning:
+
+> Intel is not aware of production environments that use 32-bit mode on Skylake-gen CPUs. So this should not be a concern.
+
+Also, it is rare to see any efforts for 32-bit maintenance. So, it should not come as a surprise.
+
+Hence, if you use your system for any tasks that a security issue can disrupt, you should steer clear of 32-bit kernels.
+
+Of course, exceptions can include that you have an entirely offline setup. So, it would be up to you, but it is not recommended.
+
+### Don’t Care About Security?
+
+Even if you do not have a problem with not getting critical security fixes like Retbleed, there will be more trouble with 32-bit systems in 2022.
+
+Software maintainers aeventually giveup on tools and Linux distribution updates to work well with 32-bit systems.
+
+So, you may not be left with actively maintained programs for your 32-bit Linux system very soon.
+
+Hence, it would be a good idea to make the switch (and upgrade) now.
+
+_Do you still use 32-bit Linux? What do you think about it? Share your thoughts in the comments below._
+
+--------------------------------------------------------------------------------
+
+via: https://news.itsfoss.com/64-bit-linux/
+
+作者：[Ankush Das][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://news.itsfoss.com/author/ankush/
+[b]: https://github.com/lujun9972
+[1]: https://itsfoss.com/32-bit-linux-distributions/
+[2]: https://itsfoss.com/best-linux-media-server/
+[3]: https://i.ytimg.com/vi/dmSPvJxPm80/hqdefault.jpg
+[4]: https://www.phoronix.com/news/Linux-x86-Retbleed
+[5]: https://lore.kernel.org/lkml/20220715221901.xm3c4w4idqt67uja@desk/