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ubuntu-desktop% sudo apt-get install dhcp3-server tftpd-hpa nfs-kernel-server

http://marcansoft.com/transf/gentoo-ps3-20101020.tar.bz2 = rootfs
http://www.multiupload.com/E8IQAO2PB3 = kernel image and modules

extract rootfs into /mnt/experimental:
% sudo mkdir -p /mnt/experimental
% sudo tar -C /mnt/experimental -xvpf /path/to/gentoo-ps3-20101020.tar.bz2

then copy 2.6.36-rc7-01073-g47a9595-dirty from ps3linux.tar.gz into /mnt/experimental/lib/modules.

Set up the DHCP server. Put this in /etc/dhcp3/dhcpd.conf:

option domain-name "example.org";
option domain-name-servers 8.8.8.8, 8.8.4.4;
default-lease-time 600;
max-lease-time 7200;
ddns-update-style none;
authoritative;
log-facility local7;
subnet 192.168.2.0 netmask 255.255.255.0 {
        range 192.168.2.128 192.168.2.250;
}
next-server 192.168.2.1;
filename "kboot.conf";
option routers 192.168.2.1;

Set up your wired network interface (eth0) to have a static IP address "192.168.2.1".

Copy vmlinux file into /var/lib/tftpboot.

add this line to /etc/exports (requires root privs):

/mnt/experimental       192.168.0.0/16(rw,async,no_root_squash,no_subtree_check,anonuid=0,anongid=0)

Then everything is done. Let's start up the services:

% sudo service tftpd-hpa restart
% sudo service dhcp3-server restart
% sudo service nfs-kernel-server restart

Create a kboot.conf file in /var/lib/tftpboot with this line inside:

linux='vmlinux  video=ps3fb:mode:2 root=/dev/nfs rw ip=dhcp nfsroot=192.168.2.1:/mnt/experimental panic=5'

That's all. Run Linux from lv2patcher v9 and see if it boots.