jails bsdinstall jail

[mumu]

So reading bsdinstall(8), installing an OS in a jail doesn't include the kernel. So when doing freebsd-update -b jail, it only upgrades the userland right?

 

[SirDice]

installing an OS in a jail doesn't include the kernel.

Yes, because a jail doesn't need a kernel, it runs on the host's kernel.


-b probably assumes there's a "full" install on the destination directory, that would include a kernel. There's a -j option, specifically for jails.

       -b basedir     Operate on a system mounted at basedir.  (default: /, or
		      as given in the configuration file.)

       -j jail	      Operate  on  the	given  jail  specified by jid or name.
		      (The version of the installed userland is	 detected  and
		      the --currently-running option is	no more	required.)

freebsd-update(8)

Either way, it's not going to matter if there's a kernel (/boot/kernel/{...}) inside the jail or not, it's never going to be used. It will only use some disk space, and might be confusing, especially if it's an older kernel.