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How to Install / Upgrade to Linux Kernel 4.2 in Ubuntu
================================================================================
![](http://ubuntuhandbook.org/wp-content/uploads/2014/12/linux-kernel-icon-tux.png)
Linux Kernel 4.2 was released yesterday, at noon. Linus Torvalds wrote on [lkml.org][1]:
> So judging by how little happened this week, it wouldn’t have been a mistake to release 4.2 last week after all, but hey, there’s certainly a few fixes here, and it’s not like delaying 4.2 for a week should have caused any problems either.
>
> So here it is, and the merge window for 4.3 is now open. I already have a few pending early pull requests, but as usual I’ll start processing them tomorrow and give the release some time to actually sit.
>
> The shortlog from rc8 is tiny, and appended. The patch is pretty tiny too…
### What’s New in Kernel 4.2: ###
- rewrites of Intel Assembly x86 code
- support for new ARM boards and SoCs
- F2FS per-file encryption
- The AMDGPU kernel DRM driver
- VCE1 video encode support for the Radeon DRM driver
- Initial support for Intel Broxton Atom SoCs
- Support for ARCv2 and HS38 CPU cores.
- added queue spinlocks support
- many other improvements and updated drivers.
### How to Install Kernel 4.2 in Ubuntu: ###
The binary packages of this kernel release are available for download at link below:
- [Download Kernel 4.2 (.DEB)][1]
First check out your OS type, 32-bit (i386) or 64-bit (amd64), then download and install the packages below in turn:
1. linux-headers-4.2.0-xxx_all.deb
1. linux-headers-4.2.0-xxx-generic_xxx_i386/amd64.deb
1. linux-image-4.2.0-xxx-generic_xxx_i386/amd64.deb
After installing the kernel, you may run `sudo update-grub` command in terminal (Ctrl+Alt+T) to refresh grub boot-loader.
If you need a low latency system (e.g. for recording audio) then download & install below packages instead:
1. linux-headers-4.2.0_xxx_all.deb
1. linux-headers-4.2.0-xxx-lowlatency_xxx_i386/amd64.deb
1. linux-image-4.2.0-xxx-lowlatency_xxx_i386/amd64.deb
For Ubuntu Server without a graphical UI, you may run below commands one by one to grab packages via wget and install them via dpkg:
For 64-bit system run:
cd /tmp/
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200_4.2.0-040200.201508301530_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200-generic_4.2.0-040200.201508301530_amd64.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-image-4.2.0-040200-generic_4.2.0-040200.201508301530_amd64.deb
sudo dpkg -i linux-headers-4.2.0-*.deb linux-image-4.2.0-*.deb
For 32-bit system, run:
cd /tmp/
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200_4.2.0-040200.201508301530_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200-generic_4.2.0-040200.201508301530_i386.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-image-4.2.0-040200-generic_4.2.0-040200.201508301530_i386.deb
sudo dpkg -i linux-headers-4.2.0-*.deb linux-image-4.2.0-*.deb
Finally restart your computer to take effect.
To revert back, remove old kernels, see [install kernel simply via a script][3].
--------------------------------------------------------------------------------
via: http://ubuntuhandbook.org/index.php/2015/08/upgrade-kernel-4-2-ubuntu/
作者：[Ji m][a]
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]:http://ubuntuhandbook.org/index.php/about/
[1]:https://lkml.org/lkml/2015/8/30/96
[2]:http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/
[3]:http://ubuntuhandbook.org/index.php/2015/08/install-latest-kernel-script/

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Install The Latest Linux Kernel in Ubuntu Easily via A Script
================================================================================
![](http://ubuntuhandbook.org/wp-content/uploads/2014/12/linux-kernel-icon-tux.png)
Want to install the latest Linux Kernel? A simple script can always do the job and make things easier in Ubuntu.
Michael Murphy has created a script makes installing the latest RC, stable, or lowlatency Kernel easier in Ubuntu. The script asks some questions and automatically downloads and installs the latest Kernel packages from [Ubuntu kernel mainline page][1].
### Install / Upgrade Linux Kernel via the Script: ###
1. Download the script from the right sidebar of the [github page][2] (click the “Download Zip” button).
2. Decompress the Zip archive by right-clicking on it in your user Downloads folder and select “Extract Here”.
3. Navigate to the result folder in terminal by right-clicking on that folder and select “Open in Terminal”:
![](http://ubuntuhandbook.org/wp-content/uploads/2015/08/open-terminal.jpg)
It opens a terminal window and automatically navigates into the result folder. If you **DON’T** find the “Open in Terminal” option, search for and install `nautilus-open-terminal` in Ubuntu Software Center and then log out and back in (or run `nautilus -q` command in terminal instead to apply changes).
4. When you’re in terminal, give the script executable permission for once.
chmod +x *
FINALLY run the script every time you want to install / upgrade Linux Kernel in Ubuntu:
./*
![](http://ubuntuhandbook.org/wp-content/uploads/2015/08/run-script.jpg)
I use * instead of the SCRIPT NAME in both commands since it’s the only file in that folder.
If the script runs successfully, restart your computer when done.
### Revert back and Uninstall the new Kernel: ###
To revert back and remove the new kernel for any reason, restart your computer and select boot with the old kernel entry under **Advanced Options** menu when you’re at Grub boot-loader.
When it boots up, see below section.
### How to Remove the old (or new) Kernels: ###
1. Install Synaptic Package Manager from Ubuntu Software Center.
2. Launch Synaptic Package Manager and do:
- click the **Reload** button in case you want to remove the new kernel.
- select **Status -> Installed** on the left pane to make search list clear.
- search **linux-image**- using Quick filter box.
- select a kernel image “linux-image-x.xx.xx-generic” and mark for (complete) removal
- finally apply changes
![](http://ubuntuhandbook.org/wp-content/uploads/2015/08/remove-old-kernel1.jpg)
Repeat until you removed all unwanted kernels. DON’T carelessly remove the current running kernel, check it out via `uname -r` (see below pic.) command.
For Ubuntu Server, you may run below commands one by one:
uname -r
dpkg -l | grep linux-image-
sudo apt-get autoremove KERNEL_IMAGE_NAME
![](http://ubuntuhandbook.org/wp-content/uploads/2015/08/remove-kernel-terminal.jpg)
--------------------------------------------------------------------------------
via: http://ubuntuhandbook.org/index.php/2015/08/install-latest-kernel-script/
作者：[Ji m][a]
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]:http://ubuntuhandbook.org/index.php/about/
[1]:http://kernel.ubuntu.com/~kernel-ppa/mainline/
[2]:https://gist.github.com/mmstick/8493727