You can follow the instructions in the SSH Public key howto
You can contact me and give me the information.
Please DO NOT email me ANY passwords. You can send username and server names, but please do not send me passwords in email. Email is not a secure channel for communication. The most secure way to get me access to your box is to use my SSH public key.

You've got good IT people in place, and just need that extra bit of expertise to save time and money, once your staff learns how to do what needs to be done they can run the show. You want more advanced setups, to push the Linux infrastructure you've spent lots of time and money on even further.

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Someone setup a few Linux/BSD servers and has left the company. You need to get them under control and make sure they're running good before something goes wrong.

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Your Apache server is acting odd, or isn't performing like it used to. You want to know what it's doing and why, if someone's hacking/attacking it or load is high. You want traffic reporting, performance and error monitoring setup.

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You got a call from someone who says that your site is hacked and is attacking their site. You need immediate response. You need to know what's going on as soon as possible, and more importantly to get things back to normal and avoid future, similar problems.