If anyone still interested: I got this error recently (15 min ago), and by now have managed to resolve it.
The problem was in my /etc/hosts file - it was missing "127.0.0.1 localhost" line. It was removed by "Network Settings" applet when I tried to add an alias "127.0.0.1 testhost" for my apache virtual host.
If anyone still interested: I got this error recently (15 min ago), and by now have managed to resolve it.
The problem was in my /etc/hosts file - it was missing "127.0.0.1 localhost" line. It was removed by "Network Settings" applet when I tried to add an alias "127.0.0.1 testhost" for my apache virtual host.