DNS Spoofing
So you want to use access local domain name on your iDevice, such as mac.home, ubuntu.local? Unfortunately iDevice wouldn't allow you editing system files, in this case, /etc/hosts.
Workaround:
Install
dnsmasq on a local server, and change iPad
DNS to your local server
Install
charles proxy, enable
DNS Spoofing feature, on iPad, change proxy server to IP where
charles installed.