Conquering the Command Line: Unix and Linux Commands for Developers by Mark Bates is free online. Learn to master and conquer the most valuable and useful command line tools for Unix and Linux based systems. In this book you will find not only the most useful command line tools you need to know, but also the most helpful options and flags for those tools.
Free Programming Books
This book is an introduction to computer programming. It covers the essential information of a Computer Science course. It is recommended for beginners and intermediate programmers.
Download the latest draft copy of Professor Robert Harper’s Practical Foundations for Programming Languages in pdf format. This book offers a fresh perspective on the fundamentals of programming languages through the use of type theory.
Open Data Structures: An Introduction, by Pat Morin, can be read online or downloaded in pdf format. It is available as Java and C++ editions.
Get Introduction to Programming using Fortran 95, by Ed Jorgensen, in pdf format. This book provides an introduction to programming and problem solving using the Fortran 95 programming language.
This early release of Heroku: Up and Running, by Neil Middleton and Richard Schneeman, is available online for free from O’Reilly.
“Vagrant: Up and Running Create and Manage Virtualized Development Environments” by Mitchell Hashimoto.
Learn Vimscript the Hard Way, by Steve Losh, is free to read online. It is a book for users of the Vim editor who want to learn how to customize Vim.
Extended version of “97 Things Every Programmer Should Know – Collective Wisdom from the Experts”, compiled by Shirish Padalkar, is available as a downloadable eBook with a minimum price of $0.00 from Leanpub.
“Learning Statistics with R”, by Daniel Navarro, is still a work in progress, but it has reached a “first draft” stage, at 542 pages.