Resources for non-CS undergraduates: introduction to linux, etc

• Linux Tutoral: Basic commands
This website offers a brief overview of Linux including its file system, commands, editors, data manipulation, shell programming, and compression and encoding.
• Linux Command Library
More thorough than the preceding tutorial, this website offers two kinds of commands used in Linux -- Built-in Shell Commands and Linux Commands -- and explains their differences.
• Linux Tutorial
This website provides more than the basics of Linux and provides in-depth introduction to the Linux system. It includes easy-to-understand articles in the tutorial as well as a glossary where you can find definitions of particular terms.
• Manipulating Directories and Files
This website explains how to manipulate directories and files in the Linux system. For quick tutorial of the following terms such as cd, mkdir, mv, pwd, and rmdir, this website will prove very convenient.
• Basic Linux Commands
This website offers a more extensive list of the commands of manipulating directories and files as well as changing file access permissions. This website also offers ways to copy, create a symbolic link to a file, etc.