cse332: Laboratory Exercise 1
Becoming Acquainted with Linux

Due: During your lab section (1/20)

1. Login: Login to a host in the Linux lab.
2. Create course directories: If you don't already have a directory for course related material, create it now.

   mkdir classes
   mkdir classes/cse332

3. Add new environment variables: Edit your login script and add an environment variable for this class then source this file to update your current shell environment. Each shell has a slightly different way of defining environment variables and for including commands defined in a file into the current environment. Below I give a table describing each:

   shell	tcsh and csh	bash	sh and korn
   Define env. variable	setenv CSE332 ~/classes/cse332	export CSE332=~/classes/cse332	export CSE332=~/classes/cse332
   Include in current shell	source script	source script or . script	. script
   Login script	~/.cshrc	~/.bashrc	~/.profile

4. Create lab directory: Create a new directory for this lab and change the current working directory to this new directory (i.e. cd into the new directory):

       mkdir $CSE332/lab1
       cd $CSE332/lab1
     

5. Common tools: Demonstrate proper use of the following tools:
   
   • ls - list directory contents.
   • cd - change working directory.
   • mkdir -  create a new directory.
   • grep - search files for a matching regular expression.
   • find - search one or more directories for all entries that match a list of conditions.
   • diff - compare two files displaying those lines that differ.
   • wc - display the number of lines, words and characters in the listed files.
6. Create a simple C++ program: Write a simple C++ program that prints the string "Hello World".

     #include <iostream>
   
     int
     main (int argc, char **argv)
     {
       std::cout << "Hello World" << std::endl;
       return 0;
     }
   

     g++ -Wall -o hello hello.cc

   Then execute the program you just created by typing its filename at the shell command line (notice that I generally include the absolute path to the executable):

   ./hello

   Be able to explain the purpose of each command line option used for g++ (use the man pages).