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When trying to install dropbox from terminal (using How to install Dropbox? guide),

and trying to install the repository key I get the following:

~$ sudo apt-key adv --keyserver --recv-keys 5044912E
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.0A2B16zRzS --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver --recv-keys 5044912E
gpg: requesting key 5044912E from hkp server
gpgkeys: key 5044912E not found on keyserver
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0

Even when I try to just install dropbox itself:

$ cd ~ && wget -O - "" | tar xzf -
--2014-01-28 14:12:27--
Resolving <proxy> (<proxy>)...
Connecting to <proxy> (<proxy>)||:8080... connected.
Proxy request sent, awaiting response... 407 Proxy Authentication Required
2014-01-28 14:12:27 ERROR 407: Proxy Authentication Required.

gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error is not recoverable: exiting now

however, this should not be a proxy problem as other machines seem to be able to overcome the proxy problem and the Software Center can install it (but then I cannot get the key).

Any suggestions?

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The issue seemed to be the lack of an SSL connection to retrieve the nautilus-dropbox directly from Dropbox.

I downloaded it from a Ubuntu/Linux server and now seems to work well. Once installed, had to add the proxies directly to Dropbox (does not seem to automatically pick up Ubuntu's network proxies).

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You can set this as solution, in order to mark the question as solved. – davidbaumann Dec 7 '15 at 18:21

Just download following file with your browser: Dropbox
Then continue with the installation.

share|improve this answer
If I do that, then I need the proprietary daemon, which I think sends me back to the problem above. – Loligo Jan 28 '14 at 5:10
I guess trying will not take very long... – davidbaumann Jan 28 '14 at 11:12

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