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{{DISPLAYTITLE:proc/user_beancountersssh keys}}
OpenSSH has several authentication mechanisms. The most known one is then you type in the password, which is then checked against the password at the remote system. While this is straightforward and does not usually require any additional setup, it is not convenient to enter the password each time.
== Theory ==
OpenSSH uses several assymmetric cryptography algorithms, where a pair of keys are generated. Those keys are known as ''public key'' and ''private key''. Public keys can then be uploaded to a remote system which you want a passwordless access to. ''See more at [http://en.wikipedia.org/wiki/Public-key_cryptography [wikipedia: Public-key cryptography]].''
''Your'' OpenSSH public keys are usually stored in <code>~/.ssh/id*.pub</code> files, and your private keys are stored in the <code>~/.ssh/id*</code> files (the ones without <code>.pub</code> suffix).