Textbook in PDF format

All You Need to Know, and Nothing You Don't, About Core Tools for Software Development
Three of the core tools needed for modern software development are the Unix command line, a text editor, and version control with Git. But you don't need to learn "everything" about them, just how to use them efficiently to solve real problems. In Learn Enough Developer Tools to Be Dangerous, renowned instructor Michael Hartl teaches the specific concepts, skills, and approaches you need so you can learn to write apps, get hired, collaborate, and maybe even launch your own company.
Even if you've never used (or even heard of) these tools before, Hartl helps you quickly build technical sophistication and master the lore you need to succeed. Focused exercises help you internalize what matters, without wasting time on details pros don't care about. Soon, it'll be like you were born knowing this stuff–and you’ll be suddenly, seriously dangerous.
Learn enough about . . .
Running a terminal, entering and editing commands, and using man pages
Manipulating and inspecting files: from basic copying to finding patterns
Organizing files with directories
Learning Minimum Viable Vim
Basic and advanced editing techniques with editors like Atom and VS Code
Using the human-readable Markdown language for writing quick documentation
Formatting source code and writing executable scripts
Getting started with Git and GitHub
Using key Git workflows: commit, push, branch, merge, and more
Collaborating on Git projects and resolving code conflicts
Setting up dev environments: macOS, Linux, Windows, and cloud