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chroot on Unix-like operating systems is an operation that changes the apparent root directory for the current running process and its children.(Read more ...)

Basic Installation

Building a "chroot" is very easy in Debian.

You will need:

aptitude install binutils debootstrap

mkdir -p /var/chroot/etch

debootstrap --arch i386 etch /var/chroot/etch

chroot /var/chroot/etch

Configuration

In general, it is necessary to create/edit key configuration points

Configuring a chroot is relatively static and very specific, it may be possible to dispense with the command "top-level" and directly edit files.

/etc/passwd
/etc/groups

/etc/hosts
/etc/resolv.conf

/etc/fstab

Mounting pseudo filesystems

/proc

proc on /proc type proc (rw)
sysfs on /sys sysfs kind (rw)

/dev/pts

In this case, the primary system, run the command:

mount --bind /dev/pts /var/chroot/etch/dev/pts

Default Configurations

Generally the file /etc/fstab might look like this:

# cat /etc/fstab | grep chroot
/dev /var/chroot/etch/dev auto bind 0 0
/dev/pts /var/chroot/etch/dev/pts auto bind 0 0
/proc /var/chroot/etch/proc auto bind 0 0

Therefore mount on the primary system would be:

# mount | grep chroot
/dev on /var/chroot/etch/dev -type none (rw, bind)
/dev/pts on /var/chroot/etch/dev/pts kind none (rw, bind)
/proc on /var/chroot/etch/proc type none (rw, bind)

Adding / removing packages

apt-get install deborphan

deborphan -a

apt-get remove --purge telnet manpages pppconfig ipchains ...

Complementary list svgalibg1 whiptail

apt-get install emacs21 local mc

Usage

Common examples of chroot usage:


ToDo - Clean up from French translation.