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I am currently using ubuntu 14.04 LTS

I was getting a 404 error whenever I used sudo apt-get update.

I feel it is because of some trusted software providers which I deleted - ubuntu archive automatic signing key (2012) and another, that I've forgotten.

I thought these are added because of my mistakes and wrong commands while installing VMware.

After doing this I am getting errors in software updates. Is this because of what I just did?

here are all of the errors:

errors are Err http://ppa.launchpad.net trusty/main amd64 Packages                        
  404  Not Found
Err http://ppa.launchpad.net trusty/main i386 Packages                         
  404  Not Found
Ign archive.ubuntu.com trusty/universe Translation-en_US Fetched 1,069 kB in 51s (20.7 kB/s)

W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32

W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32

W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32

W: Failed to fetch ppa.launchpad.net/picaso/octave/ubuntu/dists/trusty/main/… 404 –
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  • We need to see the new error when you run the command sudo apt-get update. Please edit it in.
    – Tim
    May 22, 2015 at 16:51
  • Ign archive.ubuntu.com trusty/universe Translation-en_US Fetched 1,069 kB in 51s (20.7 kB/s) W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: Failed to fetch ppa.launchpad.net/picaso/octave/ubuntu/dists/trusty/main/… 404
    – Patriot
    May 22, 2015 at 16:56
  • these are some other errors
    – Patriot
    May 22, 2015 at 16:56
  • Please edit it in and format as code, by selecting and pressing Ctrl+K or clicking the {} button. Then you can have the whole thing in the code.
    – Tim
    May 22, 2015 at 17:06
  • @Tim here we go
    – Patriot
    May 22, 2015 at 17:37

1 Answer 1

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You can add Public Keys to your apt keychain using apt-key. It is up to you to determine whether or not to trust the keys and import them. Here is how you would do it:

  1. sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 886DDD89 7F0CEB10 C300EE8C
    • Where keys are separated by spaces.
    • You may use full keys, or the last eight characters, as show above.
    • This example would import Tor, NGINX and MongoDB keys.

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