#summary All about installing custom kernels.

= Linux Network Namespaces =

== Running a custom kernel PPA on Ubuntu ==

PPA = Personal Package Archive, an unsupported/bleeding-edge repository of deb packages.

The example here is installing the 2.6.35-rc4 kernel on Ubuntu 10.04. Normally 10.04 (Lucid) gives you a 2.6.32 kernel, but the 2.6.35 kernel features improved namespace support for netlink and iptables (thanks to patches submitted by Tom Goff.) This will allow us to run SMF for example, using netlink queueing to capture packets, and allows using the `tc` command for applying QoS rules.

 # add the [https://launchpad.net/~kernel-ppa/+archive/ppa PPA for Ubuntu Kernel] to your system. Follow the link for more instructions.
{{{
sudo add-apt-repository ppa:kernel-ppa/ppa
}}}
   If you are behind a firewall/proxy, the above command will likely fail to import the key from the keyserver. Solution can be found here [http://www.linuxquestions.org/questions/linux-software-2/adding-ppa-key-to-apt-748592/]
 # install the new kernel
{{{
# on 2010-07-07 this installed linux-image-2.6.35-7-generic
sudo apt-get install linux-image-generic-lts-backport-maverick
}}}
 # reboot to enable the new kernel; with the new GRUB 2, you need to hold down SHIFT if you want to interrupt startup and select a kernel.

== Building a custom Ubuntu kernel ==
Follow the directions here:
 * https://wiki.ubuntu.com/KernelTeam/GitKernelBuild
 * when running `make oldconfig` watch out for "CONFIG_X86_MRST=y" on 2.6.35 and set it to "n", or keyboard/mouse may be disabled ([http://ubuntuforums.org/showthread.php?p=9562261 thread])

= FreeBSD =

A small patch is required to the standard FreeBSD 8.x kernel for running CORE. That patch is included in the CORE source under the `kernel/` directory. See the FreeBSD installation instructions for recompiling the kernel.