Linux Kernel 4.2 已經發布了，這是 Linus Torvalds 近期發布的最大的一個版本，增加了超過100萬行代碼，移除了大約25萬行代碼。主要新特性包括：新的AMDGPU驅動；Intel Broxton支持；改進NCQ TRIM處理；F2FS文件系統加密；重寫了部分英特爾x86匯編代碼；LSM Stacking；延遲梯度網絡擁堵控制算法；改進控制組的回寫管理等等。
以下內容來自郵件列表：
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.
安裝說明。
Ubuntu 系統用戶安裝，ubuntu 提供了 DEB 安裝包，下載地址：kernel.ubuntu.com，你也可以使用以下命令安裝。
32位用戶：
下載安裝包命令：
cd /tmp
wget
kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200_4.2.0-040200.201508301530_all.deb
kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200-generic_4.2.0-040200.201508301530_i386.deb
kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-image-4.2.0-040200-generic_4.2.0-040200.201508301530_i386.deb
安裝 Kernel：
sudo dpkg -i linux-headers-4.2*.deb linux-image-4.2*.deb
卸載 kernel：
sudo apt-get remove linux-header-4.2* linux-image-4.2*
64位用戶：
下載安裝包命令：
cd /tmp
wget
kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200_4.2.0-040200.201508301530_all.deb
kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-headers-4.2.0-040200-generic_4.2.0-040200.201508301530_amd64.deb
kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/linux-image-4.2.0-040200-generic_4.2.0-040200.201508301530_amd64.deb
安裝 Kernel：
sudo dpkg -i linux-headers-4.2*.deb linux-image-4.2*.deb
卸載 kernel：
sudo apt-get remove linux-header-4.2* linux-image-4.2*
CentOS 7 用戶安裝
su root
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install kernel-ml
reboot
卸載 kernel 4.2
yum remove kernel-ml
怎樣在 CentOS 7 上安裝 Kernel 4.0.2 http://www.linuxidc.com/Linux/2015-05/117574.htm
怎樣在 CentOS 7 系統上安裝Linux Kernel 4.0 http://www.linuxidc.com/Linux/2015-04/116461.htm
如何在Ubuntu/CentOS上安裝Linux內核4.0 http://www.linuxidc.com/Linux/2015-04/116565.htm
如何在Ubuntu 13.10上安裝Linux內核 3.12 http://www.linuxidc.com/Linux/2013-11/92930.htm
如何在Ubuntu 14.10,Ubuntu 14.04及其衍生版本安裝 3.16.7 CKT2內核 http://www.linuxidc.com/Linux/2014-12/110189.htm
Linux Kernel 的詳細介紹：請點這裡
Linux Kernel 的下載地址：請點這裡
