I did a fresh install of 14.04 from a CD I made on a HP DL380. After the installation I rebooted and did the following with the results below.

What am I missing? and where is that wcdh-dc-wg01 coming from?

$ sudo apt-get update
Err http://security.ubuntu.com trusty-security InRelease
Err http://us.archive.ubuntu.com trusty InRelease
Err http://us.archive.ubuntu.com trusty-updates InRelease
Err http://us.archive.ubuntu.com trusty-backports InRelease
Err http://security.ubuntu.com trusty-security Release.gpg
Could not resolve 'wcdh-dc-wg01'
Err http://us.archive.ubuntu.com trusty Release.gpg
Could not resolve 'wcdh-dc-wg01'
Err http://us.archive.ubuntu.com trusty-updates Release.gpg
Could not resolve 'wcdh-dc-wg01'
Err http://us.archive.ubuntu.com trusty-backports Release.gpg
Could not resolve 'wcdh-dc-wg01'
Reading package lists... Done
  • Do you have a working internet connection? Including proper name resolution? – Hinz Jul 16 '15 at 22:17

You have Internet connection problem.

Make sure you have an Internet connection (wire, wireless)

It seems your DNS server config can't resolve http://us.archive.ubuntu.com.

Try this $ sudo echo "nameserver" > /etc/resolve.conf This solution only works temporarily, after you reboot, it's gone.

I propose 2 solutions for you :

  • You can change your DNS resolver/server permanently per Internet network by using Network Manager to setup your DNS server for that network . For example : you have an wireless network named "Lily", in Network Manager you can statically set your DNS server( at your top right of your screen bar)

  • You can change your DNS resolver/server permanently for every Internet network by doing this in Ubuntu : $ sudo echo "nameserver" >> /etc/resolvconf/resolv.conf.d/head

@RE Donald French 2nd comment : There is nothing is returned to apt-get. apt-get requests a (HTTP) connection to http://us.archive.ubuntu.com/, and before doing that it needs to ask DNS server first. Since your server is not allowed to connect to Internet -> your DNS request can't be done -> apt-get cannot connect to http://us.archive.ubuntu.com/

Could not resolve 'wcdh-dc-wg01' indicates that DNS request can't be done.

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apt-get cannot communicate with that host

open synaptic package mgr -> settings -> repositories -> other software - then search for and remove that wcdh-dc-wg01 repository

then run sudo apt-get update again


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  • on a side note - what happens when you open web browser and go to http://security.ubuntu.com and http://us.archive.ubuntu.com The other thing that could be is there could be something going on with your network settings - when i go to these pages I am able to get to index of files ftp blank page – gingamann Jul 16 '15 at 23:17
  • Neither of those is the problem. That 'url' is not in anything plus I can ping us.archive.ubuntu.com. This is a server with no graphic turned on. – Donald French Jul 17 '15 at 16:46

The problem is the server was being blocked by some security at the facility. The real problem is apt-get is just reading lines from what it gets back from the request if the status is OK. I am not positive it is OK though. The security at the facility was returning a screen saying that the server was not allowed to access the internet. This was determined by doing a curl on http://us.archive.ubuntu.com and seeing the html for the notice.

apt-get just accepting what is returned as valid with no checks seems like a bug to me. I would have thought it would do a simple sanity check that the url it was going to was at least a real url. wcdh-dc-wg01 is not a valid url in the least bit.

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  • apt-get didn't accept the returned contents as valid. Notice the first part of each line (except the error messages) starts with Err, which indicates that there was some error in reading the repository. – saiarcot895 Jul 17 '15 at 17:04

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