Felitaur Enterprises, Command Line UNIX

Overview
Goals for this Topic: Understand the structure of the UNIX command line Explain the four basic parts of an Operating System Be able to define the Shell and it's purpose Learn some basic commands Command Line editing, history and TAB completion The following programs/files/directories will be discussed for this topic: passwd date who who am i exit history ! (bang operator) ^c ^d ^l
Questions
What is an operating system? What are the four basic parts of an OS and what do they do? What is a shell? What is a GUI? What types of shells are there? What is our default shell? What is the difference between a shell prompt and the command line? what does the up arrow do? How do you edit a previous command? What is Tab completion? What is meant by "case sensitive" in UNIX? What are options? What must be the FIRST thing you type on the command line?
Activities & Assignments
Practice tab completion. try to get to my cgibin directory by cd /h (hit tab to find home) you now have cd /home/ (hit tab twice) you should see philw among the choices Type p and hit tab You should now have cd /home/philw If you hit enter, you will be IN my home directory, but ls will give you a "permission denied" error" (If nothing pops up, hit tab twice, this will give you the list of things that start with that letter (say p for example) and you may have to type one or two more letters before tab will complete it for you) type ls -l and then using tab completion, put in the following path: /usr/src/kernels/[ tab twice and choose one of the kernels installed]/scripts/selinux/ and then hit enter to see what is in that directory
Resources
List of Linux Commands from linux in a nutshell online. Another good list of Linux Command line Note: Categories are listed in menu on left under "Commands by Argument A good discussion of why you would use a Command Line instead of a GUI