From Serebra Learning Corporation
UNIX Files and Directories 
This course describes the
UNIX system of directories and files. It explains the structure of the UNIX hierarchical file system and how to access files and directories. It also presents the commands for copying, moving, removing, renaming, and backing up files in the directories, as well as the process for renaming, removing and backing up directories. Permission rights which are required for
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i-Net+ Part 1: Internet Basics and Infrastructure 


This is the first course in a four part series that introduces internetworking. It describes internetworking components and when to use them. This course also introduces the
OSI Layer and
TCP/IP,
DNS hierarchical structure, and remote access protocols. Topics covered include network access points,
ISPs and
Internet backbone, and the Internet connectivity process.
more...
i-Net+ Part 1: Internet Basics and Infrastructure 
This is the first course in a four part series that introduces internetworking. It describes internetworking components and when to use them. This course also introduces the
OSI Layer and
TCP/IP DNS hierarchical structure and remote access protocols. Topics covered include network access points
ISPs and
Internet backbone and the Internet connectivity process.
more...