I've just done a fresh install of Ubuntu (10.04.1) plus LAMP (via sudo tasksel install lamp-server) and everything is working fine, until I need to work on localhost when I do not have an internet connection. For example, as soon as I unplug the ethernet cable from the NIC, localhost and 127.0.0.1 stop working. The message I get from the browser is:
This web page is not available.
Then, as soon as I plug the ethernet cable into the laptop again, everything is back to normal again. I need to work on localhost sometimes when I do not have access to the internet.
Any idea how to fix this problem? I had this problem before, but can't remember when I did to resolve it.