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Discover the hidden power of the command line

Learn Enough Command Line Developer Fundamentals 01

Learn Enough Command Line to Be Dangerous is an introduction to the Unix command line for complete beginners. Because the command line is a foundational technology for everything else in tech, this first Learn Enough tutorial is the best place to start for “learning to code”.

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90 pages
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hours
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4 chapters
 
21 videos
 
67 exercises

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The Learn Enough tutorials are available as books, downloadable videos, and online courses. Learn Enough Command Line to Be Dangerous includes 90 pages of book content and 1¼ hours of video.

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Full online version of the book content, embedded streaming videos for all sections, exercises with editable answers, progress tracking, and membership in the Learn Enough Society (community exercise answers, private chat group). Pause your subscription at any time!

ebooks (Online and Offline)

Online HTML version accessible from any web browser, downloadable ebooks in all common formats (EPUB, MOBI/Kindle, PDF). Files are yours to keep forever!

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Downloadable versions of all screencast videos. Note: Does not include ebooks, so the video/ebook bundle is strongly recommended. Files are yours to keep forever!

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Learn Enough offers a generous scholarship program to help out in case cost is a factor. We’ve already awarded over 1000 Learn Enough Scholarships to a wide variety of recipients, including students, people between jobs, and residents of countries with unfavorable exchange rates. Applications are quick, easy, and 100% confidential. Learn More

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Developer Fundamentals BUNDLE
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This is the place to start learning technical sophistication. Learn Enough Developer Fundamentals covers three essential tools for the aspiring computer magician: the Unix command line, text editors, and version control with Git. After this level, you will be in a position to collaborate with millions of developers around the world, even if you’re not (yet) a developer yourself.

All bundles include the course version of all the tutorials (streaming video, exercise answers, and progress tracking), and access to the Learn Enough society to get help if you need it.

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Learn Essential Skills

In the Command Line Tutorial

Terminal tabs

“In the Beginning was the Command Line”

The essential tool for developers

Suppose you wanted to go search through a large amount of text and count the number of lines matching a particular word or phrase. Say, the number of times the word “rose” appears in the famous Sonnets by William Shakespeare. What might be the easiest way to do this? The answer is to use the command line.

Understanding the basics of the command line is absolutely essential to becoming a skilled software developer. It’s also useful for anyone who needs to work with developers, such as product managers, project managers, and designers. Making this critical component of modern computing accessible to as broad an audience as possible is the goal of Learn Enough Command Line to Be Dangerous.

To be productive with the command line, you don’t have to know everything about it—you just have to learn enough to be dangerous.

Dev desktop

Manipulate files

You don't always need an interface

In Learn Enough Command Line to Be Dangerous, you’ll learn how to use the command line to manipulate files, include creating, listing, renaming, copying, and deleting them. Stringing together command-line commands can be ten times faster than using a graphical interface.

Man grep

Download and search

Even the internet can be reached

You’ll also learn how to download files from the Internet, quickly look inside of them, and search through them. You can do a quick content check in a fraction of the time it would take to open a separate application. And you can easily find all the lines that match a particular pattern, even if the file is hundreds or thousands of lines long.

Directory folder

Work with directories

Precise automation at the command line

Finally, you’ll learn how to work with directories (folders): making, changing, renaming, copying, and deleting them. As with file commands, these can be strung together to accomplish common tasks an order of magnitude faster than with graphical tools.

The result learning enough command line to be dangerous is a solid foundation for every other aspect of modern computing technology.

Table of Contents
Scholarship 1
Scholarship 17
Scholarship 3
Scholarship 26
Scholarship 5

What People Are Saying

Jimmywales
Jimmy Wales Founder, Wikipedia

Q: What is Jimmy Wales' favorite book?

A: It changes often. At the moment, it’s Ruby on Rails Tutorial by Michael Hartl. :)


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About the Command Line Tutorial

Michael Hartl’s guide to the command line is an awesome tutorial for beginners and a great refresher for experienced programmers as well.

— Paul Yi
Amazon link

I bought the Learn Enough command line program and videos last fall, and it’s paid off sooooo many times in my new job. During my first week, I had a manager sitting right beside me giving me the “go here, go there, do this, etc.” Having watched, read, and done the exercises, I was confident in getting around the CLI—and even had him asking, ”What was that shortcut?” For this, I thank you. Now I need a “Learn even more CLI to be dangerouser.”

— Thomas Thackery

I’m just writing to say I enjoyed Learn Enough Command Line to Be Dangerous. I’m a senior CS student and was actually already familiar with the UNIX console, however, I didn’t find your book boring or tedious at any point, quite the contrary! It was a nice refresher of the basics, and I actually learned some new tricks (being able to search inside the manpages for instance). The chapter + exercise format was effective in solidifying concepts for me.

— Eric Z.

I stumbled upon your website by luck a couple weeks back and since then I have gone through the Developer Fundamentals series, which I have to say exceeded my expectations and filled in many gaps in my knowledge which multiple other online tutorials failed to do.

— Tayyab I.
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About the Learn Enough Courses

I must say, this Learn Enough series is a masterpiece of education. Thank you for this incredible work!

— Michael K.

I must say, this Learn Enough series is a masterpiece of education. Thank you for this incredible work!

— Michael K.

I want to thank you for the amazing job you have done with the tutorials. They are likely the best tutorials I have ever read.

— Pedro I.

I have been trying to learn web development and programming on and off for the past 3 years and your website is the first one that I feel does the job right.

— Janelle S.

Just bought the new ebook and want to say keep up the great work!! The Learn Enough to Be Dangerous series re-ignited my desire to code after 10+ years of “meh”.

— Diane Y.

The Learn Enough Society and the courses are incredible. It’s the best value in the market of online courses in my opinion. Like you say, it’s learning to tech, which is very useful in our world.

— Sébastien D.

I just meant to tell you: your tutorial books from the Learn Enough series are awesome! The books are well-written, clear, concise, super-useful, and even fun to read. Thank you so, so much for this! I have bought the first three and will buy whatever you publish next. Keep up doing this very good work and thanks again.

— Pierre W.

Have been following the whole “Learn Enough to Be Dangerous” series and am VERY impressed with it. I am a project manager who works with software developers daily. These sessions have provided me with a huge amount very useful information, to the extent that I now not only understand what the dev guys are talking about, but am starting to use the tools (command line, Git, etc.) that they use.

— Brian
Amazon link

Michael Hartl is one of the best educators around when it comes to web development. I have been following him for a long time, and everything he produces is top quality. If you are looking for a quick way to become a thorough and productive professional web developer, Hartl’s books are a great place to start.

— Abram Bailey
Amazon link

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About the Author
Michael-hartl

Michael Hartl

Michael Hartl is the creator of the Ruby on Rails Tutorial, one of the leading introductions to web development, and is cofounder and principal author at Learn Enough. Previously, he was a physics instructor at the California Institute of Technology (Caltech), where he received a Lifetime Achievement Award for Excellence in Teaching. He is a graduate of Harvard College, has a Ph.D. in Physics from Caltech, and is an alumnus of the Y Combinator entrepreneur program.

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