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I'm trying for the first time to use gpg to encrypt a file with a symmetric key, but gpg doesn't seem to respond when I use the -c switch.

gpg -v -c filename

.. just doesn't seem to do anything, nor to report any error, and just hangs until I hit ctrl-c.

Any ideas?

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3 Answers

If you have DISPLAY variable set it may be used to display prompt for password in a dialog window (it may have not appeared if you have DISPLAY set to some weird value). To verify that unset the variable:

unset DISPLAY

and try again.

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It might be timing out checking for the gpg-agent. I have trouble with this for some commands, and you can run gpg with gpg --no-use-agent, and it will proceed.

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Adding sudo before the command solved it for some reason

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-1: It's never a good idea to just randomly put sudo in front of commands. –  Wuffers Nov 22 '10 at 18:29
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