how to create a public/private key using ssh-keygen

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Old 10-28-2011
how to create a public/private key using ssh-keygen

please guide me create a public/private key using ssh-keygen, lets say I have been access to server named pngpcdb1with a userid and password ...!!! and also please explain in detail the concept of these keys and ssh as I was planning to use them in ftp related scripts..! Thanks in advance..!!Smilie
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Old 10-28-2011
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