Mini How-to/Cheatsheet

How to create a Debian install inside a chroot with Debootstrab

debootstrap –arch i386 lenny $CHROOTDIR

debootstrap lenny|testing|unstable

Remember you can use release name (lenny) or type testing; the important difference is that if you use, say, squeeze, which is now testing, when it becomes stable, you stay on squeeze; if you use testing, you stay on testing even when squezee is released. –arch can be omitted if not set it’s the default setting

Configure the chroot

First, mount the /proc filesystem.

mount -t proc proc $CHROOTDIR/proc
mount -t devpts devpts $CHROOTDIR/dev/pts # Don’t worry if this doesn’t work
for you.

Enter the chroot
LANG=C chroot $CHROOTDIR/ /bin/bash

The LANG it’s important to avoid errors with programs that require setting locales, if you wish you can do apt-get install locales o dpkg-reconfigure locales.

Important to not confuse chroot with normal system

export PS1=»CHROOT:\w# »

Also you can create


and put something like «lenny» and when do chroot that adds to the prompt.

Commands to configure the chroot

You only run them once.

cd /dev; /sbin/MAKEDEV generic; cd –

To prevent problems with locales entering the chroot

LANG=C chroot $CHROOTDIR /bin/bash

Sometimes MAKEDEV will fail from inside chroot you can do outside the chroot as root

Also sometimes debotstrab forgot to get the signing key for the archive-repositories, most of times doing apt-get update && apt-get upgrade fixes it, if not you need to install debian-archive-keyring.

At the end one can free space with apt-get clean and with deborphan.

Its good idea to umount $CHROOTDIR/proc and $CHROOTDIR/dev/ when shutting down the machine.

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