Linux Administration/Security/Encryption

This lesson covers encryption.

Objectives and Skills
Objectives and skills for the encryption portion of Linux+ certification include:
 * Securing data with encryption
 * Perform basic OpenSSH 2 client configuration and usage
 * Understand the role of OpenSSH 2 server host keys
 * Perform basic GnuPG configuration, usage and revocation
 * Understand SSH port tunnels (including X11 tunnels)
 * The following is a partial list of the used files, terms and utilities:
 * ssh
 * ssh-keygen
 * ssh-agent
 * ssh-add
 * ~/.ssh/id_rsa and id_rsa.pub
 * ~/.ssh/id_dsa and id_dsa.pub
 * /etc/ssh/ssh_host_rsa_key and ssh_host_rsa_key.pub
 * /etc/ssh/ssh_host_dsa_key and ssh_host_dsa_key.pub
 * ~/.ssh/authorized_keys
 * /etc/ssh_known_hosts
 * gpg
 * ~/.gnupg/*