I hadn't done pacman -Syu for about a month on my 3 servers.
one of the packages to come down was openssh-6.9p1-1.
After the reboot everything worked BUT.... SSH.
Thankfully, I had a serial console on one of my 3 servers.
I was able to access the cached older version openssh-6.8p1-3 by
pacman -U /var/cache/pacman/pkg/openssh-6.8p1-3-arm.pkg.tar.xz
(confirm the downgrade)
(wait)
then preventing updates to openssh (for now)
nano /etc/pacman.conf
add
IgnorePkg = openssh
save
now when you run pacman -Syu
:: Starting full system upgrade...
warning: openssh: ignoring package upgrade (6.8p1-3 => 6.9p1-1)
The good news, is that SSH can now be ignored (for now) and everything continues to work.
Does anyone have any ideas what is broken?