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The short story:

I just installed Ubuntu 20.4.2 on a tower that was previously running on Ubuntu 18.x. The network was working fine before the install, but I can't see any network now. I can see the ethernet port with sudo lshw -c network in the terminal, but can't ping anything.

my limitations:

  • this computer has no wireless and
  • I have no access to the router (at work)
  • I'm relatively new to Linux (although I have a lot of experience with network issues in other OSes (Mac, DOS, Windoze from 1987 to present)

More details:

  • The ping failures are ping: connect: Network is unreachable when I use an IP address, and ping: connect: Temporary failure in name resolution when I use a domain.
  • The same network is being accessed by the computer I'm typing this on (ob) right down to the same switch. I have tried swapping cables and ports on the switch even though both of those seemed like long shots.
  • The same network also works on a laptop I have running Ubuntu 20.4.2 as well.
  • I saw a problem very similar to this one here, but those solutions didn't help at all.
  • Neither has any of the research I've been able to find.

Oh, and one more thing: the installer had to access the internet, didn't it? Maybe not.

TIA, community. I'm glad you're here.

Tor Kingdon
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1 Answers1

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I am the same Tor Kingdon who posted it... hadn't realized I already had an account here. Oops. In any event, the problem seemed to go away when I brought that (rather heavy) tower home and hook it up to our home internet. If it returns when I get back to the work network, I'll contact the building's network provider. Thank you to anyone who has read this. (I'll also delete my duplicate account as soon as I can figure out how to log in to it. ;))

kingtor
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