E: GPG error: ... The following signaturess were invalid: NODATA 1 NODATA 2

[unco]

Hi, I've been struggling to find an answer to the an apt-get update problem I am having behind a NTLM proxy for a couple of days.

Any suggestions appreciated.


sudo apt-get update
...
Get:5 http://nz.archive.ubuntu.com precise-security Release.gpg [4,864 B]
Hit http://extras.ubuntu.com precise/main i386 Packages
Get:6 http://nz.archive.ubuntu.com precise Release [49.6 kB]
Ign http://nz.archive.ubuntu.com precise Release
E: GPG error: http://nz.archive.ubuntu.com precise Release: The following signatures were invalid: NODATA 1 NODATA 2

Looks like Get 5 worked even though Get 6 fails.

I have Ubuntu 12:04 64. Fresh install which I have repeated a number of time.

I then set up cntlm to handle NTLM proxy. Which I believe is working.


cntlm -v -M http://www.google.com
...
Response: '62E0E66CC930924BBECC759627780D8EC6237B3267458B6B' (24)
HEAD: HTTP/1.1 302 Found
OK (HTTP code: 302)
...


This post is from firefox on the affected machine. So know I can get thru the proxy to the web from this machine. And the cntlm results above indicate this also.

I can't figure out what is causing the problem. Proxy? Corporate web filter software? ???

I've try lots like below and much more like partial updates ...

sudo rm /var/lib/apt/lists/* -vrf
sudo apt-get clean
sudo apt-get update

It make no sense to me as my old Xubuntu 10.04 machine after adding proxy configure settings has worked fine for years with apt-get update and the proxy.

Cheers.

[unco]

I have also been given Squid proxy with no authentication and I am getting the same problem. So has to be something to do with signatures ???

E: GPG error: http://nz.archive.ubuntu.com precise Release: The following signatures were invalid: NODATA 1 NODATA 2

[unco]

Tried Squid again and it worked so must have been internet connection issues for squid and am guessing it is a cache or timeout on the ntlm proxy.

All going now! yay.