Report, Experiment: How to setup a Debian "unstable"/sid chroot with X11.
bernhard@intevation.de 20070727
(Just my experiments, this might contain the wrong solutions.)

Found important hints in:
[1] http://www.debian.org/doc/manuals/reference/ch-tips.en.html
[2] http://kanotix.com/index.php?module=pnWikka&tag=ChrootEinrichten
[3] The Debian amd64-howto.
[4] A search engine.

Hostsystem: Debian Sarge on powerpc
Chrootsystem: Debian sid

a) Creating a partition /devel with enough space and a filesystem.

b) starting the chroot
	installed backported cdebootstrap 0.3.11, 
	as the Sarge one seems to be quite old.

cdebootstrap -v sid /devel http://ftp2.de.debian.org/debian/

c) get network to work.
echo "proc-devel /devel/proc proc none 0 0" >> /etc/fstab
mount proc-devel /devel/proc -t proc
cp /etc/hosts /devel/etc/hosts
cp /etc/resolv.conf /devel/etc/resolv.conf
# MAKEDEV did not seem to be necessary

Test as root: chroot /devel /bin/bash

d) get apt-get to work and install vital packages for me
chroot in
vi /etc/apt/sources.list
	deb http://ftp2.de.debian.org/debian  sid main
	deb-src http://ftp2.de.debian.org/debian  sid main

apt-get install gnupg openssh-client vim 
Installing Intevation's logbook tools.

e) making sure a user can call the chroot
	install dchroot
  	add entries "ber" for /devel/etc/passwd  /devel/etc/shadow

     Hint: there is a bug in dchroot 0.11,  Debian #360604
     if you want to run a command directly, try setting SU_NO_SHELL_ARGS
     SU_NO_SHELL_ARGS=1 dchroot rxvt

f) try to get rxvt as X11 client to work as a user "ber"
       in the chroot: apt-get install rxvt  
       extend the mounted filesystems, see my section in /etc/fstab:

 	## for the /devel chroot
        proc-devel              /devel/proc     proc    none            0 0
        # some tools might need it:
        sys-devel               /devel/sys      sysfs   none            0 0

        # needed for X11, as /tmp/.X11.. has the pipes 
        /tmp                    /devel/tmp      none    bind            0 0
	# probably needed for X11 or rxvt, unsure why exactely
        /home             /devel/home none  bind            0 0
        # to be able to aquire pseudo ttys, e.g. for running rxvt:
        none                    /devel/dev/pts devpts   none            0 0