This blog by user Orville Bennett shows us how to update your FreeBSD jails in between point releases, for example from FreeBSD 11.1 to 11.2. This will help avoid minor command mishaps due to the version difference. See the link below for the full set of instructions.

As I’ve mentioned before, FreeBSD has this concept of a jail which allows you to isolate an environment from the host operating system. This isolation keeps the rest of the system safe from whatever is being run inside of the jail. You can liken it to running an application in a virtual machine, but without the overhead of emulating a computer within another computer.

I thought it would be useful to document using the ezjail-admin application to update jails the right way. And, while we’re at it, show how to recover from doing it the wrong way. So without further ado: …

Full tutorial: