Ub

s:~$ sudo su
sudo: unable to resolve host nas: Resource temporarily unavaila
ble
[sudo] password for norbert:
root@nas:/home/norbert# apt update
Err:1 http://archive.ubuntu.com/ubuntu bionic InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Err:2 https://download.docker.com/linux/ubuntu bionic InRelease
  Temporary failure resolving 'download.docker.com'
Err:3 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Err:4 http://archive.ubuntu.com/ubuntu bionic-backports InRelea
se
  Temporary failure resolving 'archive.ubuntu.com'
Err:5 http://archive.ubuntu.com/ubuntu bionic-security InReleas
e
  Temporary failure resolving 'archive.ubuntu.com'
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bioni
c/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bioni
c-updates/InRelease  Temporary failure resolving 'archive.ubunt
u.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bioni
c-backports/InRelease  Temporary failure resolving 'archive.ubu
ntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bioni
c-security/InRelease  Temporary failure resolving 'archive.ubun
tu.com'
W: Failed to fetch https://download.docker.com/linux/ubuntu/dis
ts/bionic/InRelease  Temporary failure resolving 'download.dock
er.com'
W: Some index files failed to download. They have been ignored,
 or old ones used instead.