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Public and Private Keys???

I need to install GNUPG on Ubuntu Linux.I followed the step but am confused where is the private key while it only shows the public one.
Is Secret key a private key?If so why are they same?

Have you read the GNUPG Doc

The Public key is used by the client you are communicating with so they can encrypt/decrypt the message.
The Private key is kept secret as only you should have access to this key.

Quote:

Originally Posted by ajeetraina (Post 3147967)

but am confused where is the private key while it only shows the public one.

What shows only the private key? Did you try:

gpg --list-secret-key keyid

Quote:

Originally Posted by ajeetraina (Post 3147967)

Is Secret key a private key?If so why are they same?

Yes, they are the same. Why shouldn't they be?

Public key crypto is based on key pairs. You have a secret key which is used for signing and decryption. You keep this key secret, on your computer. The other key in the pair is a public key, used by others for encrypting to you and verifying your signatures. You can mail this key to people, link it from a web page, or put it on public keyservers.

You need to do some research and understand this tool or you will do something bad to yourself ;)

The proper doc links are at http://gnupg.org/documentation/index.en.html

The doc referenced in the post above is not up-to-date. Maximum pubkey sizes in current versions are 4K.