The chroot allows multiple installs on the one machine without rebooting! In this way you can then keep an older ``stable'' release that some applications might require, and run those applications as in:
sudo chroot /path/to/chroot /bin/sh
Set it up with (from http://www.debian.org/doc/manuals/reference/ch-tips.en.html#s-chroot):
# cd / # mkdir /sid-root # debootstrap sid /sid-root http://ftp.debian.org/debian/ ... watch it download the whole system # echo "proc-sid /sid-root/proc proc none 0 0" >> /etc/fstab # mount proc-sid /sid-root/proc -t proc # cp /etc/hosts /sid-root/etc/hosts # chroot /sid-root /bin/bash # apt-setup # set-up /etc/apt/sources.list # vi /etc/apt/sources.list # point the source to unstable # dselect # you may use aptitude, install mc and vim :-)
I tried with a local mirror but failed:
# debootstrap sid /sid-root http://mirror.aarnet.edu.au/debian/ I: Retrieving http://mirror.aarnet.edu.au/debian/pool/main/g/ glibc/libc6_2.3.2-4_i386.deb E: Couldn't download libc6