i installed a suggestesd package 'rdnssd'. During the install my 'network-manager, network-manager-gnome ' got removed. im unable to install any package, b/c i have no network conn.

Asked by Brad Luck

I installed a "suggested" package 'rdnssd.' While installing the system removed my 'network-manager, network-manager-gnome' and a few other network related packages. I tried 'sudo apt-get install --reinstall network-manger', it runs through the initial steps of 'reading...' then it shows an error:
"Err:1 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 libndp0 amd64 1.8-0ubuntu3
     Could not resolve 'us.archive.ubuntu.com'
Err:2 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 libteamctl0 amd64 1.31-1build2
     Could not resolve 'us.archive.ubuntu.com'
Err: 3 http://us.archive.ubuntu.com/ubuntu jammy/updates/main amd64 network-manager amd64 1.36.6-0ubuntu2
     Could not resolve 'us.archive.ubuntu.com'
Err:4 http://us.archive.ubuntu.com/ubuntu jammy/updates/main amd64 network-manager-gnome amd64 1.24.0-1ubuntu3
     Could not resolve 'us.archive.ubuntu.com'"
Also a bunch of "Failed to fetch..." so i checked to make sure my dns was setup correctly or wasnt altered. And it wasnt. I then ran "ip link" to check my network interfaces. And every interface was 'DOWN". i started my 'eno1' interface. And it now reads 'UP'. So i figured id try to 'update' again... and i just got the same errors and failed to fetch. Ive even changed my dns server from '127.0.0.53' to Googles dns '8.8.8.8' but with no luck. I even asked ChatGPT to try and help me troubleshoot it, but it just keeps telling me to do the same thing over and over. whici is to 'install --reinstall network-manager" "start network-manager" "enable network-manager".
If i put anything that has to do with 'network-manager' i get the same error of "network-manager.service not found".
I am at a loss.. and dont know any other steps to take or try.
i tried to see if i could put the packages on a usb from my windows computer, but that seems to be a mission too.

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Manfred Hampl (m-hampl) said :
#1

I do not see any reason, why installing rdnssd would uninstall network-manager and other packages.

For repair, you should try the following:

Download the following files and store them on a USB stick:

https://launchpad.net/ubuntu/+archive/primary/+files/libndp0_1.8-0ubuntu3_amd64.deb
https://launchpad.net/ubuntu/+archive/primary/+files/libteamdctl0_1.31-1build2_amd64.deb
https://launchpad.net/ubuntu/+archive/primary/+files/network-manager_1.36.6-0ubuntu2_amd64.deb
https://launchpad.net/ubuntu/+archive/primary/+files/network-manager-gnome_1.24.0-1ubuntu3_amd64.deb

Plug the stick into the defective system, (auto-)mount it, open a terminal window, change directory to the directory that reflects the USB stick and issue the command

sudo dpkg --install *.deb

And finally report the results.

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