“Final?” Day Unix/Linux April 8, 2014 Dr. Bob Mathis

How We Started School was closed because of snow on Jan 7. I use Unix/Linux as just another tool. My Apple Mac has an operating system based on BSD Unix. I’ve used Unix in other jobs. Now I use it primarily to maintain my class web site. I showed how to access Unix on my Mac, then connected to the faculty Linux system (basically the same way you would connect to the student Linux system), then I used an app on my iPad, and PuTTY on a Microsoft computer like the classroom’s.

Lots of Unix Information Books on Unix/Linux and operating systems in general Internet tutorials, forums, resources OSU/CSE Open Source Club Most people learn Unix by watching some one else use or demonstrate it.

What to expect on the job. A lot of jobs just assume you know Unix. (When I restarted teaching in computer science at Ohio State, about 20 years ago, they just provided me with a networked Unix computer. The same occurred at other jobs.) This intro to Unix basics is to give you those basics.

What I Showed You and Then Asked You To Do For Yourself Log into your Linux account and build a simple web page for yourself. ssh pwd passwd ls –la echo cd sudo scp chmod cal

Other Basic Unix/Linux Commands Printing lpr –lj_dl_272_a lpr - man make grep tar touch head, tail make

Unix Philosophy Flexible development environment Oriented toward c, but other languages have fit in, Java is a good example. Eclipse links to cvs, for example. Redirection and pipes made of “filters” Linux combines Unix features and open source approach. (no wonder so popular)

Unix Concepts sudo-super user do inode - managing file storage redirection - sending standard output to file filter - standard input and output pipeline

Unix Editing emacs, vi, vim, nano, pico emacs is most powerful vi’s two modes – entering text and editing it scp – secure copy Depends on how much of what kind of work you’re doing

Version Control – Group Use rcs, cvs RCS – Revision Control System – Locking model CVS – Concurrent Version System – Merging model

bash Scripting Programming at the operating system command level Start the file of commands with #! /bin/bash

Other Commands Related to Potential Test Questions