Merge pull request #26204 from lkxed/20220623-How-to-Boot-into-an-Older-Kernel-By-Default-in-Ubuntu-and-Other-Linux

[手动选题][tech]: 20220623 How to Boot into an Older Kernel By Default in Ubuntu and Other Linux.md
2025-03-21 02:10:11 +08:00 · 2022-06-24 15:19:38 +08:00 · 2022-06-24 15:19:38 +08:00 · 1c7729bbbd
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+[#]: subject: "How to Boot into an Older Kernel By Default in Ubuntu and Other Linux"
+[#]: via: "https://itsfoss.com/boot-older-kernel-default/"
+[#]: author: "Abhishek Prakash https://itsfoss.com/author/abhishek/"
+[#]: collector: "lkxed"
+[#]: translator: " "
+[#]: reviewer: " "
+[#]: publisher: " "
+[#]: url: " "
+
+How to Boot into an Older Kernel By Default in Ubuntu and Other Linux
+======
+Here’s a possible scenario. Your system received a kernel update but somehow things are not working as smoothly as previously.
+
+You realized that if you boot into the older kernel (yes, you can downgrade kernel), things are back to normal.
+
+That makes you happy with a little inconvenience. You have to manually select the older kernel at each boot.
+
+This problem was faced by an elderly It’s FOSS reader. The new kernel update in [Linux Mint][1] wasn’t working as expected. Booting into the older kernel ‘fixed’ the issues but choosing the older kernel at each boot was a problem.
+
+Removing the new kernel (while using the older kernel) is not a good idea because the new kernel will be installed and used with the next system updates.
+
+So, I suggested booting into the older Linux kernel by default. How to do that? That’s what I am going to show you in this tutorial.
+
+### Booting into the older Linux kernel
+
+If you are not already familiar with it, your Linux distribution keeps more than one Linux kernel installed on your system. Don’t believe me? [List the installed kernels in Ubuntu][2] with this command:
+
+```
+apt list --installed | grep linux-image
+```
+
+When you get a new kernel version with the system updates, your system automatically chooses to boot into the latest available kernel.
+
+From the [grub][3] screen, you can **go to the Advanced options** (or older Linux versions):
+
+![ubuntu grub][4]
+
+Here, you can see the available kernels to boot into. Choose the older one (without recovery option):
+
+![grub advanced options][5]
+
+You won’t notice any visual difference. Your files and applications remain the same.
+
+Now that you have booted into the older kernel, it’s time to make your system boot into it automatically.
+
+### Making older kernel the default
+
+If you are comfortable with Linux terminal and commands, you can modify the /etc/default/grub file and add the following lines to it:
+
+```
+GRUB_DEFAULT=saved
+GRUB_SAVEDEFAULT=true
+```
+
+And then [update grub][6] with:
+
+```
+sudo update-grub
+```
+
+What you did here is to tell your system to save the currently used entry as the default entry for the future runs of GRUB.
+
+However, not everyone is okay with the command line and hence I’ll focus on a GUI tool called [Grub Customizer][7].
+
+#### Installing Grub Customizer
+
+Use the official PPA to [install Grub Customizer in Ubuntu-based distributions][8]:
+
+```
+sudo add-apt-repository ppa:danielrichter2007/grub-customizer
+sudo apt update
+sudo apt install grub-customizer
+```
+
+For other distributions, please use your package manager to install this tool.
+
+#### Using Grub Customizer to change the default boot entry
+
+When you run Grub Customizer, it shows the available boot entries.
+
+![grub customizer ubuntu][9]
+
+You have two options here.
+
+**Option1:** Select the desired kernel entry and use the arrow (displayed on the top menu) to move it up the order.
+
+![move older kernel up the order ubntu grub][10]
+
+**Option2:** Make the ‘previously booted entry’ the ‘default entry’.
+
+![make currently booted entry as default ubuntu][11]
+
+I would suggest going with option 2 because it will work even when there are new kernel updates.
+
+This way you downgrade the kernel in Ubuntu or other distributions without even removing the older kernel version.
+
+Do note that most distributions like Ubuntu only keep two kernel versions at a time. So eventually, your preferred older kernel will be removed with the newer kernel versions.
+
+This neat trick helped me when I [installed the latest Linux kernel in Ubuntu][12] and it had issues with my audio system for some reason.
+
+Whatever may be the reason, you now know how to boot into an older kernel automatically.
+
+Questions? Suggestions? The comment section is all yours.
+
+--------------------------------------------------------------------------------
+
+via: https://itsfoss.com/boot-older-kernel-default/
+
+作者：[Abhishek Prakash][a]
+选题：[lkxed][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://itsfoss.com/author/abhishek/
+[b]: https://github.com/lkxed
+[1]: https://linuxmint.com/
+[2]: https://learnubuntu.com/list-installed-kernels/
+[3]: https://itsfoss.com/what-is-grub/
+[4]: https://itsfoss.com/wp-content/uploads/2022/06/ubuntu-grub.jpg
+[5]: https://itsfoss.com/wp-content/uploads/2022/06/Grub-Advanced-Options.jpg
+[6]: https://itsfoss.com/update-grub/
+[7]: https://itsfoss.com/customize-grub-linux/
+[8]: https://itsfoss.com/install-grub-customizer-ubuntu/
+[9]: https://itsfoss.com/wp-content/uploads/2022/06/grub-customizer-ubuntu.png
+[10]: https://itsfoss.com/wp-content/uploads/2022/06/move-older-kernel-up-the-order-ubntu-grub.png
+[11]: https://itsfoss.com/wp-content/uploads/2022/06/make-currently-booted-entry-as-default-ubuntu.png
+[12]: https://itsfoss.com/upgrade-linux-kernel-ubuntu/