Held: Thursday, 30 January 2014

Back to Outline 01 - Introduction. On to Outline 03 - The Bash Shell - A Refresher.

Summary

We consider a few basic *nix tools and their use in solving tasks.

Related Pages

• GitHub for homework 1: https://github.com/Grinnell-CSC282/hw1
• GitHub for homework 2: https://github.com/Grinnell-CSC282/hw2-2014S
• EBoard (Source) (HTML) (PDF)

Overview

• Fun with GitHub.
• Go over homework.
• Exercise: The spaces problem.
• Raymond, chapter 1.
• Thinking about basic tools.

Administrivia

• I encourage you to attend CS table on Friday and talk about the ACM code of ethics.
• Status check 1: How many of you know the C bitwise operations? (&, |, etc.)
• Status check 2: Could anyone not make class if I moved it to 3:15pm? (Hands closed, blackball-style question.)
• Note: I was overly optimistic at the start of the semester. Given the amount of time daily homework is taking in my three classes, I probably won't get a lot of chance to write the "book" for this class. I will try to set up some lab problems, though.

GitHub

• We'll take a look at the GitHub repo to see what we've learned about GitHub use.

Going Over Homework

The C Memory Problem

x = malloc (...);
foo ();
bar ();
free (x);   // CRASH

Background question: How does free work?

Find all of the misspelled words in a text file

Extract the five highest grades

Extract URLs

Exercise: Remove all blank spaces at the end of lines

If you have not yet written this program in C, please do so now.

Raymond

What, if anything did you learn from reading Raymond?

A Bit About Basic Tools

• As you may remember from the first day of class, I noted that to be successful in using nix, you need to know a variety of tools (and know *of a wider variety).
• There's no way we can do a full in-depth exploration of each important *nix tools. So we'll look at common uses of a few important tools.
• My goal is to do two or three today and to deal with others as they come up.

Homework

1. Learn Markdown so that we can use it for these assignments.

2. Learn about how you set and get environment variables. Put your explanations in the directory.

   • Command line
   • Bash
   • C (get only)

3. Update our list of "things every *nix user should know" (either in the repo

4. Come up with two or three tasks, similar to those we did for assignment 1, and put notes about them in the tasks directory. (You can include some sample solutions in your file.)

5. Read the first chapter of the Make book.