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FreeBSD 13.x – Mastering JAILS


  • Basic UNIX / BSD knowledge



welcome to the ‘FreeBSD 13.x – Mastering JAILS’ course. The purpose of this course is to give a deep overview of what Jails are, and how to use them for building testing or production-ready environments. All this using a great BastilleBSD project.

What you’ll learn:

  • Create FreeBSD lab environment for a safe Jails testings
  • Get deeper understanding what Jails are
  • Maintain Jails using BastileBSD
  • Understand Jails networking
  • Get some practice with Jails backups
  • Use BastileBSD for maintaining multiple Jails environment in seamless way

What are FreeBSD Jails from Wikipedia:

“The jail mechanism is an implementation of FreeBSD’s OS-level virtualization that allows system administrators to partition a FreeBSD-derived computer system into several independent mini-systems called jails, all sharing the same kernel, with very little overhead. It is implemented through a system called jails, as well as a userland utility plus, depending on the system, a number of other utilities. The functionality was committed into FreeBSD in 1999 by Poul-Henning Kamp after some period of production use by a hosting provider and was first released with FreeBSD 4.0, thus being supported on a number of FreeBSD descendants, including DragonFly BSD, to this day.

The need for the FreeBSD jails came from a small shared-environment hosting provider’s (R&D Associates, Inc.’s owner, Derrick T. Woolworth) desire to establish a clean, clear-cut separation between their own services and those of their customers, mainly for security and ease of administration (jail(8)). Instead of adding a new layer of fine-grained configuration options, the solution adopted by Poul-Henning Kamp was to compartmentalize the system – both its files and its resources – in such a way that only the right people are given access to the right compartments.”

Topics covered in this course:
‘Mastering Jails’ course covers most of the Jails setup options available and required for running Jails in real live scenarios. The main topics include:

  • Jails Essentials
  • Creating a FreeBSD Lab environment
  • Using BastilleBSD for managing Jails in many different ways
  • Setting Jails networking in the right way
  • BONUS: Running FreeBSD Jail on Raspberry PI

During the course, we build a lab environment with fresh FreeBSD installation and we setup Jails from the ground to a production-ready environment. We will practice working with Jails, backing them up, or do networking the right way. All this using a great BastilleBSD project.


FreeBSD 13.x Mastering Jails course covers various topics related to using Jails to manage running different software packages in a secure way. Using Jails you can avoid security issues/holes in software packages you host on your system.

Who this course is for:

  • ‘FreeBSD 13.x – Mastering JAILS’ course is targeted for individuals or small/medium teams of professional administrators, devops or developers. Jails can serve as a production ready server side option, testing environment for admins and developers or as runtime option for projects backends during development process.

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