Unix and Linux (Tutorials and CheatSheet)

Unix and Unix-like operating systems are used in the majority of servers, Smartphones including iOS and Android, macOS, and Windows has a Subsystem for Linux. Linux is a family of open source Unix-like operating systems built around the Linux kernel. This is a series of tutorials on how to use Unix/Linux for software developers.

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Link to Unix and Linux Introduction tutorial page

Unix and Linux Introduction

This section goes over terminology such as the difference between UNIX, Unix-like and Linux. How to launch the Unix Shell program. And demonstrates some useful Unix commands.

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Link to File System tutorial page

File System

This section goes over the file system. How to make, move, copy, rename, and delete files and directories from the command line. How to navigate the file system.

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Link to Permissions and Ownership tutorial page

Permissions and Ownership

This section goes over file and directory permissions and ownership, including how to list and change permissions and ownership, and the sudo command.

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Link to Environment Variables and Aliases tutorial page

Environment Variables and Aliases

This section covers environment variables. What they are. How to access them. How to create them. It also covers shell startup files, which is where you add your own env variables. Also covers aliases which allow you to add your own shortcut commands.

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Link to Other Useful Unix Commands tutorial page

Other Useful Unix Commands

This section goes over several commonly used commands. The cat, head, tail, and less commands are used for printing file content to the terminal. Grep is used for searching for words in one or more files. Pipes are used for running two or more commands sequentially, using the output of the first command as the input for the next command. There are a number of system management related commands including disk usage, terminal usage, and processes commands.

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