The warning errors I was getting when I tried to login as edavis5: Authentification failure. And then getting in as luser: /usr/network not available! Contact your System Administrator.
On Cardinal,
ifconfig showed that it wasn’t connected to the internet.
ifup eth0, and now it’s connected.
uptime told me that it’s been up for 1 day, 36 minutes. So something weird happened at about 6 am on 4/29/13.
So I saved the logfiles from 4/49/13 in /var/log/messages.429outage on cardinal. And then looked at the same ones on tempest, and saved them in a similar file. My guess is that with this little power outage blip that the clients all went down and in that time that they were trying to come back up, tempest was down or at least not receiving their requests to connect.
For now I’m just going around logging into luser, ifup eth0-ing, and then rebooting.