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Chrooting daemons and system processes
The idea behind chroot is fairly simple. When you run BIND (or any other process) in a chroot jail, the process is simply unable to see any part of the filesystem outside the jail. For example, in this document, we'll set BIND up to run chrooted to the directory /chroot/named. Well, to BIND, the contents of this directory will appear to be /, the root directory. Nothing outside this directory will be accessible to it. You've probably encounted a chroot jail before, if you've ever ftped into a public system.
By Jonathan at Linux Exposed.
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