Revision as of 06:36, 30 March 2014 by Craig Peacock (Talk | contribs)

Building an Emdebian (Embedded Debian) root filesystem for GuruPlug/armel

Many of the distros are dropping support for ARMv5 and when you do find one, today's 'minimal' root filesystem is typically a couple hundred of megabytes.

Emdebian (Embedded Debian) has the advantage that not only still supporting ARMv5, but it has a multistrap tool that gives the ability to customise the root filesystem on the host and only include the packages you need.

Debian is now my choice for a root filesystem on the GuruPlug.

To build your root filesystem, create a multistrap configuration file called GuruPlugRootFS.conf and add the following:

debootstrap=Emdebian Net Utils


#Basic packages to enable the networking
packages=netbase net-tools ethtool udev iproute iputils-ping ifupdown isc-dhcp-client ssh 

#General purpose utilities
packages=locales adduser nano less wget vim rsyslog dialog

Save and run the multistrap tool:

# multistrap -f GuruPlugRootFS.conf

Now configure the Emdebian packages with the QEMU emulator. This will configure various packages, set your shell and time zone.

# cp /usr/bin/qemu-arm-static guruplug-rootfs/usr/bin
# LC_ALL=C LANGUAGE=C LANG=C chroot guruplug-rootfs dpkg --configure -a

Set your root password:

# sudo chroot guruplug-rootfs passwd

Set your hostname:

# echo guruplug >> guruplug-rootfs/etc/hostname

Initialise your fstab:

# echo proc /proc proc defaults 0 0 >> guruplug-rootfs/etc/fstab

If you desire to have a terminal available on the serial/console port, you will need to edit /etc/inittab and modify/uncomment:

# Example how to put a getty on a serial line (for a terminal)
#T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
#T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100

I use

T0:23:respawn:/sbin/getty -L ttyS0 115200 vt100