I have Ubuntu 16.04 and all of a sudden my connection to the wifi stopped working. My tablet in same room continued to connect. I restarted and used different users on my account, and deleted my connection to the internet and re-authenticated several times.
When I would try to connect, and authenticate I would get an error: "connection activation failed", though now i forget where.
I saw this: Can't connect to WiFi with "Connection activation failed" error after upgrade from 14.04 -> 15.04
and it was suggested that I reinstall network-manager but that didn't work out of box so I did the unthinkable and did
sudo apt remove network-manager
without thinking. I try
sudo apt-get install network-manager
but obviously it can't connect to the internet and gives me this:
Temporary failure resolving 'us.archive.ubuntu.com'
Err:2 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 network-manager-gnome amd64 1.2.6-0ubuntu0.16.04.4
Temporary failure resolving 'us.archive.ubuntu.com'
Err:1 http://security.ubuntu.com/ubuntu xenial-security/main amd64 network-manager amd64 1.2.6-0ubuntu0.16.04.3
Temporary failure resolving 'us.archive.ubuntu.com'
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/n/network-manager/network-manager_1.2.6-0ubuntu0.16.04.3_amd64.deb Temporary failure resolving 'us.archive.ubuntu.com'
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/n/network-manager-applet/network-manager-gnome_1.2.6-0ubuntu0.16.04.4_amd64.deb Temporary failure resolving 'us.archive.ubuntu.com'
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
so I downloaded the files at
And I don't know what to do with them or where to put them.
Note: I hadn't updated for a while (recovering from injury) and so maybe my network-manager was out of date.
It has been suggested to me that I boot from a LiveCD, but I wanted to ask if it was possible to just install the most current files.
