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Follow these steps to create a debian wheezy root filesystem.  In this section we will use # host to indicate commands run on the host machine, and # chroot for commands commands run inside the chroot filesystem.  

1. Install dependencies:
    

   Code Block
   # host sudo apt-get install multistrap qemu-user-static

2. Pick a working folder, in this case ~/duovero
 

3. Create a directory to hold the root filesystem:

   Code Block
   # host cd ~/duovero mkdir rootfs

4. Create a configuration file debian.conf in ~/duovero and paste in the following.  Additional packages can be included here or installed later using apt-get.  

   Code Block

   [General] arch=armel directory=~/duovero/rootfs retainsources=~/duovero/sources cleanup=true noauth=true unpack=true bootstrap=Wheezy Net Utils aptsources=Wheezy [Wheezy] packages=apt locales udev adduser sudo nano build-essential less source=http://mv.ezproxy.com.ezproxyberklee.flo.org/debian suite=wheezy [Net] packages=netbase ifupdown iproute net-tools iputils-ping ntp source=http://mv.ezproxy.com.ezproxyberklee.flo.org/debian [Utils] packages=wget source=http://mv.ezproxy.com.ezproxyberklee.flo.org/debian

5. Run multistrap to create the root filesystem.  

   Code Block
   # host sudo multistrap -a armel -d ~/duovero/rootfs -f debian.conf

   In ubuntu 14.04 you may need to remove $forceyes from /usr/sbin/multistrap at line 989
   
   

6. Copy the QEMU ARM emulator into the new root filesystem so it is on the path when we chroot in.  

   Code Block
   # host sudo cp /usr/bin/qemu-arm-static ~/duovero/rootfs/usr/bin/

7. (Optional) If you need /dev/random (for installing openssh-server for example), mount /dev in the chroot.  

   Code Block
   # host sudo mount -o bind /dev ~/duovero/rootfs/dev

8. Chroot into the new filesystem.  

   Code Block
   # host sudo chroot ~/duovero/rootfs /bin/bash

9. Finish setting up packages 

   Code Block
   # chroot dpkg --configure -a

   Answer "no" when prompted to use "dash" as "/bin/sh".  If any packages fail to configure (possibly ifupdown), just run dpkg again.  

10. Set the root user password.

    Code Block
    # chroot passwd

11. (Optional) Add a new user and give it sudo permissions 

    Code Block
    # chroot adduser mit printf "mit ALL=(ALL) ALL" >> /etc/sudoers

12. Configure locales.  Choose 138 for en_US.UTF-8.  

    Code Block
    # chroot dpkg-reconfigure locales

13. Add a DNS server 

    Code Block
    # chroot printf "nameserver 8.8.8.8" > /etc/resolv.conf

14. Add a static network entry for eth0 (install the isc-dhcp-client package for dhcp support) 

    Code Block
    # chroot nano /etc/network/interfaces   auto eth0 iface eth0 inet static address 192.168.1.102 netmask 255.255.255.0 gateway 192.168.1.1

15. Restart networking to apply the new interface. 

    Code Block
    # chroot /etc/init.d/networking restart

    This might yield an error, but try pinging something anyways and it should work.  

16. Update the apt repositories 

    Code Block
    # chroot apt-get update

17. Assign a hostname and update the hosts file 

    Code Block
    # chroot printf "nostromo" > /etc/hostname printf "127.0.0.1 nostromo\n" >> /etc/hosts

18. Add the serial console (specific to gumstix overo and duovero) 

    Code Block
    # chroot printf "T0:2345:respawn:/sbin/getty -L 115200 ttyO2 vt102\n" >> /etc/inittab

19. Add a proc filesystem to fstab 

    Code Block
    # chroot nano /etc/fstab   # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0

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# chroot
cd /etc/init.d
sudo ln -s /home/mit/joshhoverland/hovergroup/third_party/josh_rtklib/start_silvana.sh start_silvana.sh
sudo ln -s /home/mit/joshhoverland/hovergroup/third_party/josh_rtklib/start_rtkrcv.sh start_rtkrcv.sh
sudo update-rc.d start_silvana.sh defaults
sudo update-rc.d start_rtkrcv.sh defaults

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