For more information about SSH, refer to the following resources.
The /usr/share/doc/openssh-<version-number>/ directory — Replace <version-number> with the installed version of the OpenSSH package. This directory contains a README with basic information about the OpenSSH project and a file called RFC.nroff with general information about the SSH protocol.
SSH related man pages — There are a number of man pages for the various applications and configuration files involved with SSH. The following is a list of some of the more important man pages.
man ssh — Describes how to use this command to connect to an SSH server.
man scp — Describes how to use this command to copy files to and from an SSH server.
man sftp — Describes how to use this command to interactively copy files to and from and SSH server.
man sshd — Describes available command line options for the SSH server.
man ssh_config — Describes the format and options available within the configuration file for SSH clients.
man sshd_config — Describes the format and options available within the configuration file for the SSH server.
http://www.openssh.com — The OpenSSH FAQ page, bug reports, mailing lists, project goals, and a more technical explanation of the security features.
http://www.openssl.org — The OpenSSL FAQ page, mailing lists, and a description of the project goal.
http://www.freessh.org — SSH client software for other platforms.
Red Hat Enterprise Linux System Administration Guide; Red Hat, Inc. — The OpenSSH chapter explains how to set up an SSH server and use the SSH client software provided in the OpenSSH suite of tools. It also explains how to generate an RSA (or DSA) key pair, which allow for password-free logins.