Non hai il permesso di accedere a / su questo server

user@localhost:~$ sudo ss -ltp | grep 80
sudo: unable to resolve host localhost.localdomain
[sudo] password for user:
user@localhost:~$ sudo ss -ltp | grep 80
sudo: unable to resolve host localhost.localdomain
user@localhost:~$ sudo -s
sudo: unable to resolve host localhost.localdomain
root@localhost:~# ss -ltp | grep 80
root@localhost:~# ss -ltpn | grep 80
root@localhost:~# ss -ltpn | grep http
root@localhost:~#

as you can see show me “unable the resolve …” first and then ask for the password

as root it shows nothing ?