# Unix Utilities

In this project, you'll build a few different UNIX utilities, simple versions
of commonly used commands like **cat**, **ls**, etc. We'll call each of them a
slightly different name to avoid confusion; for example, instead of **cat**,
you'll be implementing **my-cat**.

Objectives:
* Re-familiarize yourself with the C programming language
* Learn a little about how UNIX utilities are implemented
* Learn (as a side effect) how to use a proper code editor such as emacs

## my-cat

The program **my-cat** is a simple program. Generally, it reads a file as
specified by the user and prints its contents. A typical usage is as follows: 

```
my-cat main.c
```

In this case, **my-cat** will read the file **main.c** and print out its
contents. 

You'll need to learn how to use a few library routines from the C standard
library (often called **libc**) to implement the source code for this program,
which we'll assume is in a file called **my-cat.c**. All C code is
automatically linked with the C library, which is full of useful functions you
can call to implement your program. Learn more about the C library
[here](https://en.wikipedia.org/wiki/C_standard_library) and perhaps
[here](https://www-s.acm.illinois.edu/webmonkeys/book/c_guide/)<sup>[1](#myfootnote1)</sup>.  






## my-grep

## my-zip and my-unzip

## my-sort

## my-uniq



### Footnotes

<a name="myfootnote1">1</a>: Unfortunately, there is a lot to learn about the
C library, but at some point, you've just got to **read documentation** to
learn what is available. Why not now, when you are young? Or, if you are old,
why not now, before it's ... ahem ... too late?