There are other SSH commands besides the client ssh. Each has its own page.

ssh-keygen - creates a key pair for public key authentication
ssh-copy-id - configures a public key as authorized on a server
ssh-agent - agent to hold private key for single sign-on
ssh-add - tool to add a key to the agent
scp - file transfer client with RCP-like command interface
sftp - file transfer client with FTP-like command interface
sshd - OpenSSH server

The ssh program on a host receives its configuration from either the command line or from configuration files ~/.ssh/config and /etc/ssh/ssh_config.
configuration items:

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