Lab 00 Discussion Linux Basics CSCE 212 Computer Architecture Lab 00 Discussion Linux Basics Topics Login in SWGN 1D39, a Linux Lab (3D22 is another) Code-all.tgz (all the code from the book) Basic Unix Commands January 16, 2018

Overview Last Time New – Next Time: Lec00 – C primer slides (we did not go over these in class) New – Login Filesystem “tree” Basic Commands Saving attachment from email “code-all.tgz” Unpacking Compiling showbytes Running Next Time:

Login to Unix/Linux Boxes in 1D39 Your Login name is the root_name of your USC email address Your password is your email password To logout you … (I’ll check on this. On my Linux box it is done differently and I’ll have to go down to 1D39 to remember how you do it there.

Unix file system / At every point in Unix you are “in” the current working directory At login your “current directory” initially will be your home-dir You specify files and directories with paths A full path (starts with slash) /acct/matthews/212 A relative path does not start with ‘/’ and starts from the current directory acct bin dev etc … proc matthews cp … ls device drivers 212

Basic Commands ls – list the contents of this directory cd – change directory pwd – print working (current) directory mkdir – make a directory cp – copy file mv – move a file (= rename) rm – remove a file pico (maybe nano) – a simple editor gcc (Gnu C Compiler) – man cmd – print the manual page on cmd

30 Useful Unix Commands From Univ. of Manchester 1997 http://www.maths.manchester.ac.uk/~pjohnson/resources/unixShort/examples-commands.pdf

More Unix references 50 Most Frequently Used UNIX / Linux Commands (With Examples) 2010 Ramesh Natarajan More experienced selection of commands http://www.thegeekstuff.com/2010/11/50-linux-commands/?utm_source=feedburner 100 Useful Unix Commands & Unix Intro. 2014 by Oliver http://www.oliverelliott.org/article/computing/ref_unix/ http://www.oliverelliott.org/article/computing/tut_unix/

Saving and unpacking code-all.tgz mkdir 212 Student webmail Save attachment cd // go home cd Downloads cp code-all.tgz ~/212 cd ~/212 ls tar xvfz code-all.tgz

Compiling showbytes Cd code Cd data gcc show_bytes.c // this produces a.out ./a.out // run the executable gcc show_bytes.c –o prog // names the executable prog ./prog // run the executable Note show_bytes.c might be show-bytes.c