Re: does rescue kernel ever update

[Matthew Miller]

On Thu, Jun 03, 2021 at 02:20:33PM -0400, Jon LaBadie wrote:
> On my 3 systems, F34, F34, and CentOS7, they are
> 1, 2, and 6 years old respectively.
> > Are old rescue kernels still useful?  (6 years?)

Yes -- they will let you boot into the system. The rescue initrd includes
all available drivers and so can boot even if the drive is in a very
different system from the one it was installed on.
> Are there automated or manual procedures to update
> a rescue kernel?

There's generally no reason to. But you can with
/etc/kernel/postinst.d/51-dracut-rescue-postinst.sh $(uname -r) /boot/vmlinuz-$(uname -r)
> Are there best practices for rescue kernel update?
> If there are, I've missed them.

That's because the best practice is generally to not worry about it.