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I tried to install some third party packages by following instructions on this URL.

After doing the following, I started to get the error "Unable to locate the package"

root@ubuntu:/# cd /root/
root@ubuntu:~# wget http://www.webmin.com/jcameron-key.asc
root@ubuntu:~# apt-key add jcameron-key.asc

After googling I found if I deleted the sources.list file it will be recreated, which I did. But whenever I try to install anything it gives the error "Unable to locate package". I tried generating the source.list file and pasting the content it seems to work but, when I go the following.

sudo apt-get update

it gives me this error.

W: GPG error: http://ubuntu-cloud.archive.canonical.com precise-updates/grizzly Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5EDB1B62EC4926EA

How can I solve this, I have been googling for days now, can't just re-install my server. Thanks.

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You really don't need to reinstall your server because of this. This is just a problem with handling the keys that sign the repositories' contents. You need to read the apt-key(8) and gpg manpages.

Try this procedure:

  • look for the public key hinted in the error message.

    # gpg --recv-keys 5EDB1B62EC4926EA
gpg: requesting key EC4926EA from hkp server pool.sks-keyservers.net
gpg: key EC4926EA: public key "Canonical Cloud Archive Signing Key <[email protected]>" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)

  • once the key has been downloaded, export it to a file.

    # gpg --export EC4926EA > canonical.asc

  • now you can add it to the APT keyring.

    # apt-key add canonical.asc

  • update the indices by issuing: 

    # aptitude update

  • now there should be no problem listing packages from that repository, provided you have it properly configured in your sources.list.

    # aptitude search $package
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  • Thank you very much for the response. I get this result. gpg: WARNING: unsafe ownership on configuration file `/home/himsadmin/.gnupg/gpg.conf' gpg: external program calls are disabled due to unsafe options file permissions gpg: keyserver communications error: general error gpg: keyserver receive failed: general error
    – JRulz
    Oct 10, 2013 at 10:55
  • That error message means exactly that: review the ownership and permissions of your gpg.conf, it should belong to you, your group and don't be group or others readable or writable.
    – dawud
    Oct 10, 2013 at 10:58
  • Thank you very much, everything works perfectly now. Your answers were specific, clear and timely.
    – JRulz
    Oct 11, 2013 at 5:41

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