FreeBSD Jails Description
Many tools have been created to make system administration easier. These tools can improve the way systems are configured, installed, and maintained. Jails are one of the tools that can be used to increase the security of a FreeBSD-based system. Jails have been around since FreeBSD 4.X. They continue to improve in their reliability, security, and usefulness. Jails are based on the chroot(2) concept. This is used to modify the root directory of a group of processes. This creates an environment that is safe and separate from the rest. Jails are a way to improve the traditional chroot environment. Processes are limited in what part of the file system they have access to in a traditional chroot environment. The chrooted processes share the rest of the system resources, users, running processes, as well as the networking subsystem with the processes of both the host system and the chrooted processes.
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