Thanks for taking the time to report this bug and helping to make Ubuntu
better. This is not a bug, but rather expected behavior:
https://wiki.ubuntu.com/SecurityTeam/FAQ#Sudo
Please feel free to report any other bugs you may find.
** Visibility changed to: Public
** This bug is no longer
Sorry, I meant to use the following link:
https://wiki.ubuntu.com/SecurityTeam/FAQ#Rescue%20Mode
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Manual Network Settings resolv.conf overwritten by Dialog Recovery Mode Boot
(root+net login) if network-manager is deinstalled (manual set
interfaces/hosts/resolv.conf)