=====Raspberry Pi - PXE server=====
I was in need of a simple small PXE server (DHCP and TFTP). PXE server on ethernet, management via wifi.

====Prerequisites====
  * Old first gen. RPI.
  * SDCard, large enough to host images / files.
  * Wifi dongle (for management).
  * Most of the commands below need to be run as root.

====Raspbian install====
  * Download latest [[https://downloads.raspberrypi.org/raspbian_lite_latest|Raspbian Lite (Stretch)]]
  * Validate download:<code># From website:
SHA-256:
e942b70072f2e83c446b9de6f202eb8f9692c06e7d92c343361340cc016e0c9f

sha256sum 2017-11-29-raspbian-stretch-lite.zip 
e942b70072f2e83c446b9de6f202eb8f9692c06e7d92c343361340cc016e0c9f  2017-11-29-raspbian-stretch-lite.zip</code>
  * Check if partitions already have been mounted and unmount those.<code>lsblk # or mount command
umount /dev/sdX{1,2}</code>
  * Copy image to SDCard:<code>
unzip 2017-11-29-raspbian-stretch-lite.zip
dd if=2017-11-29-raspbian-stretch-lite.img of=/dev/sdX bs=1M && sync
</code>
  * Mount partitions (unmount first if auto-mounted under /run/media/...):<code>

mount /dev/sdX2 /mnt
mount /dev/sdX1 /mnt/boot
</code>
  * Enable SSH:<code>
touch /mnt/boot/ssh
</code>
  * Generate wifi config:<code>
wpa_passphrase YOUR_SSID YOUR_PASSPHRASE >> /mnt/etc/wpa_supplicant/wpa_supplicant.conf

# Remove the plaintext passphrase, change country
vi /mnt/etc/wpa_supplicant/wpa_supplicant.conf
</code>
  * Set hostname:<code>echo pxe >/mnt/etc/hostname</code>
  * unmount partitions

=====RPI configuration====
  * Boot the RPI with the above prepared SDcard.
  * If everything went well, it will connect to your wifi network.
  * Log in, using SSH, with username and password:''pi:raspberry''.<code>ssh pi@pxe</code>
  * Change user ''pi'' password. Or create a new account and delete the ''pi'' user.
  * Update the OS:<code>sudo su -
apt-get update
apt-get upgrade</code>
  * Configure the RPI:<code>raspi-config

- Boot options: console
- Locale
- Timezone
- Expand filesystem
</code>
  * Reboot
  * Check for new firmware:<code>rpi-update</code>
  * Install and configure uncomplicated firewall<code>apt-get install ufw
ufw allow ssh
ufw allow in on eth0 from any port 68 to any port 67 proto udp
ufw allow in on eth0 from any to any proto udp port 69

ufw default deny
ufw enable

modprobe nf_conntrack_tftp # temporary, line below is for loading at boot
echo "nf_conntrack_tftp" >> /etc/modules-load.d/modules.conf
</code>
  * Disable unnecessary services:<code>
systemctl disable avahi-daemon --now
</code>
====PXE server====
  * Configure static IP address on network interface:<code>
cat >> /etc/dhcpcd.conf <<EOF
interface eth0
static ip_address=10.0.0.1/24
EOF

systemctl daemon-reload
systemctl restart dhcpcd
</code>
  * Install packages:<code>apt-get install dnsmasq syslinux-common pxelinux</code>
  * Configure dnsmasq:<code>
cat > /etc/dnsmasq.d/server.conf <<EOF
no-dhcp-interface=wlan0

dhcp-range=eth0,10.0.0.10,10.0.0.100

enable-tftp
tftp-root=/var/lib/tftp

# For BIOS based systems
dhcp-boot=pxelinux.0

EOF

mkdir /var/lib/tftp

systemctl restart dnsmasq

mkdir -p /var/lib/tftp/pxelinux.cfg


ln -s /usr/lib/PXELINUX/pxelinux.0 /var/lib/tftp/
ln -s /usr/lib/syslinux/modules/bios/ldlinux.c32 /var/lib/tftp/
ln -s /usr/lib/syslinux/modules/bios/menu.c32 /var/lib/tftp/
ln -s /usr/lib/syslinux/modules/bios/libutil.c32 /var/lib/tftp/

</code>
===Memtest example (for serial console)===
  * Memtest 5.01<code>
cd 
wget http://www.memtest.org/download/5.01/memtest86+-5.01.bin.gz
gunzip memtest86+-5.01.bin.gz

mkdir -p /var/lib/tftp/memtest
cp memtest86+-5.01.bin /var/lib/tftp/memtest/memtest86+-5.01

cat > /var/lib/tftp/pxelinux.cfg/default <<EOF
console 0
serial 0 115200 0

default memtest86
prompt 1
timeout 15

label memtest86
  menu label Memtest86+ 5.01
  kernel /memtest/memtest86+-5.01 console=ttyS0,115200
EOF

systemctl restart dnsmasq
</code>

===Voyage Linux example===
  * Download ''voyage-0.11.0_amd64.iso''.
  * Prepare Voyage Linux 0.11 config:<code>

mkdir /var/lib/tftp/voyage0.11
mount -o loop voyage-0.11.0_amd64.iso /mnt

cp /mnt/live/initrd.img /var/lib/tftp/voyage0.11/
cp /mnt/live/vmlinuz /var/lib/tftp/voyage0.11/
cp /mnt/live/filesystem.squashfs /var/lib/tftp/voyage0.11/

cat > /var/lib/tftp/pxelinux.cfg/default <<EOF
serial 0 115200 0
console 0

default menu.c32
prompt 15

MENU TITLE PXE Menu
TIMEOUT 30

LABEL Voyage64bit
    MENU LABEL Voyage Linux 0.11 64 bit
    KERNEL /voyage0.11/vmlinuz
    APPEND initrd=/voyage0.11/initrd.img boot=live fetch=tftp://10.0.0.1/voyage0.11/filesystem.squashfs live-getty noautologin console=ttyS0,115200

LABEL Voyage32bit
    MENU LABEL Voyage Linux 0.11 32 bit
    KERNEL /voyage0.11-32bit/vmlinuz
    APPEND initrd=/voyage0.11-32bit/initrd.img boot=live fetch=tftp://10.0.0.1/voyage0.11-32bit/filesystem.squashfs live-getty noautologin console=ttyS0,115200
EOF

</code>
  * Log in and install Voyage:<code>ssh root@<dhcp-address> #pass = voyage

/usr/local/sbin/format-cf.sh /dev/sdX
mkdir /mnt/cf
/usr/local/sbin/voyage.update




Configuration details:              
----------------------                         
                                                         
Distribution directory:   /          
                                                              
Disk/Flash Device:        /dev/sda
Installation Partition:   /dev/sda1                          
Bootstrap Partition:      /dev/sda1
                                               
Will be mounted on:       /mnt/cf                        
                                     
Target system profile:    ALIX                        
Target console:           serial
Target baud rate:         115200

Bootstrap installer:      grub
Bootstrap partition:      /dev/sda1

OK to continue (y/n)? y

</code>

{{tag>[hardware rpi raspberry pxe linux ]}}