$ su
Password:
Посмотрите выдачу
nslookup ya.ru
должно быть:
$ nslookup ya.ru
Server: 127.0.0.1
Address: 127.0.0.1#53
Non-authoritative answer:
Name: ya.ru
Address: 77.88.21.3
Name: ya.ru
Address: 87.250.250.3
Name: ya.ru
Address: 87.250.251.3
Name: ya.ru
Address: 93.158.134.3
Name: ya.ru
Address: 213.180.204.3
И (от root)
resolvconf -l