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I've recently regenrated and uploaded a new public ssh-key using the ssh-copy-id command. Now I'm getting the following error:

ssh root@server3
Agent admitted failure to sign using the key.
root@server3's password:

How do I fix this problem?
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I have UNIX workstation and Linux server at work and Ubuntu desktop at home. It is recommended that I use ssh tunnel the VNC protocol for secure communication. How do I access my UNIX workstation desktop here at home over the Internet using ssh?
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Bash: Display Current Date

How do I display the current date under Bash UNIX / Linux / OS X shell?
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HowTo: Find Python Version

How do I find out python programming language version under UNIX / *BSD / Linux / Apple OS X operating systems?
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