Course “CLI fundamentals”

Course updated on October 27, 2025

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This course is free

What's included

Theory: 19 lessons

Exercises: 16

Questions: 57

Self-study tasks

Extra materials

Extended materials for 19 lessons

Description

The command line is the first thing a developer encounters when working on *nix systems such as Linux or macOS. Its significance is impossible to overestimate, it's the main way to interact with the system and the way to operate numerous programs, such as git or ansible.

You will learn

How to navigate the file system
How to deal with environment variables
How to manage file access
How to use package managers to install utilities
How to exit Vim

Syllabus

1	Introduction Course overview
2	Operating systems Learn about the history of multiuser operating systems
3	Command Line Learn about the difference between the terms “terminal” and “command shell”
4	Navigation Learn how to navigate the file system
5	Command line interface Discover how to call programs in the command shell
6	File structure Explore the file structure of *nix systems
7	Reading files Learn to view file contents
8	Grep Learn how to search for information in files without opening them
9	Editing files Learn to edit files in Nano and Vim
10	Streams Discover the concept of streams
11	Pipeline Get to know pipes and learn how to build chains of programs
12	Manipulating the file structure Learn how to create and modify files and directories
13	Environment variables Learn about environmental variables and what they're used for
14	History Learn how to navigate through the history of previously entered commands
15	Users and groups Find out what users and groups are needed for
16	Sudo Learn how to run programs as another user
17	Access permissions Learn how to read and understand file access
18	Package Manager Learn the basic method for installing programs on *nix systems
19	Executing a program Find out about the PATH environment variable and the search mechanism for executable files