Well, I am not sure where to start.
We have rails based apps.
We did nothing in our websites. (did not touch ANY config file etc).
Just a regular apt-get update, upgrade.
Suddenly 2 websites are down!
What can be the problem?
This is an ubuntu machine that we are running.
DNS is OK.
We can go to the root page that says: ubuntu... everything is working fine.
We have apache server. Tried to: sudo apachectl restart.
Also, working on AMAZON cloud if it matters (aws.amazon)
Tried to reboot from Amazon. Same result.