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[Bug 1206824] Re: bogus network proxies might cause: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)

 

I just wanted to add a comment, for any others who come to this via
Google.

I also hit this exact same error, but it turned out not to be caused
directly by the network proxy. I had just run apt-add-repository, and
that had failed to import the GPG key:

root@buildhost:/home/mblokzij/ws-qvpc# add-apt-repository ppa:x2go/stable
 Quick howto to turn your machine into an X2Go server:
...
gpg: keyring `/tmp/tmpf3fzey4y/secring.gpg' created
gpg: keyring `/tmp/tmpf3fzey4y/pubring.gpg' created
gpg: requesting key 0A53F9FD from hkp server keyserver.ubuntu.com
gpgkeys: key A7D8D681B1C07FE41499323D7CDE3A860A53F9FD can't be retrieved
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0

Note the last line.

After manually importing the key, apt-get update ran fine. I used:

apt-key adv --recv-keys --keyserver keys.gnupg.net  0A53F9FD

I realise I used a different keyserver, but I copy/pasted the key id
from the logs above.

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https://bugs.launchpad.net/bugs/1206824

Title:
  bogus network proxies might cause: Clearsigned file isn't valid, got
  'NODATA' (does the network require authentication?)

Status in apt package in Ubuntu:
  Triaged

Bug description:
  On a hotel network I  get:

  sudo apt-get update
  0% [Connecting to archive.ubuntu.com] [Connecting to ports.ubuntu.com] [Connecting to ppa.launchpad.net] [Connecting to archive.canonical.com]
  0% [Connecting to archive.ubuntu.com] [Connecting to ports.ubuntu.com] [Connecting to ppa.launchpad.net] [Connecting to archive.canonical.com]
  Get:1 http://archive.canonical.com saucy InRelease [75 B]                                                   
  89% [1 InRelease gpgv 75 B] [Connecting to archive.ubuntu.com (91.189.91.14)] [Waiting for headers] [Waiting for headers]Splitting up /var/lib/apt/lists/partial/arIgn http://archive.canonical.com saucy InRelease    
  E: GPG error: http://archive.canonical.com saucy InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)

  
  and after removing all /var/lib/apt/lists forcefully, I get this variant:

  Get:19 http://ports.ubuntu.com saucy/main armhf Packages [1,215 kB]
  Get:20 http://archive.ubuntu.com saucy-updates Release [40.8 kB]
  Get:21 http://archive.ubuntu.com saucy-security Release [40.8 kB]
  Get:22 http://archive.ubuntu.com saucy/main Sources [1,004 kB]
  Ign http://ppa.launchpad.net saucy/main Translation-en_US
  Ign http://ppa.launchpad.net saucy/main Translation-en
  Ign http://ppa.launchpad.net saucy/main Translation-en_US
  Ign http://ppa.launchpad.net saucy/main Translation-en
  Get:23 http://archive.canonical.com saucy InRelease [75 B]
  66% [23 InRelease gpgv 75 B] [22 Sources 646 kB/1,004 kB 64%] [19 Packages 710 kB/1,215 kB 58%]Splitting up /var/lib/apt/lists/partial/archive.canonical.com_ubuntu_dists_saucy_InRelease into data and signIgn http://archive.canonical.com saucy InRelease
  E: GPG error: http://archive.canonical.com saucy InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)

  
  Would be good to give better error messages that explain to folks that its likely that your network serves corrupted files (rather than ubuntu being broken). Might want to give folks hints that they could try to connect to a different wifi network etc.

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