The Linux command line basics - A hands on course

Sign up for Replit, create a workspace, and access a browser-based shell to practice Linux commands anywhere.

Explore the core hardware of a computer, including the display, motherboard, CPU, RAM, PCI slots, power supply, disk drive, hard disk, keyboard, and mouse.

Power on triggers bios or uefi, post checks memory, disks, and keyboard, loads the master boot record and Grub, then kernel and systemd start services for user login.

Learn basic Linux commands by exploring the terminal, managing processes with ps and kill, navigating the filesystem, creating and editing files, and launching programs and browsers.

Browse the Linux file system from the root directory, exploring essential folders such as bin, sbin, lib, boot, and dev, etc., and understand symlinks and kernel-related files.

Learn the difference between absolute and relative paths, using the root slash for absolute paths and dot and double-dot notation for navigating the current and parent directories, including chapters.

Navigate the Linux filesystem with commands like ls and cd, explore logical and physical paths, and view recursive, long format, human readable listings to manage directories.

Learn to copy files with the cp command, specify destination paths, and control overwriting with interactive prompts, recursive copies, and preservation of permissions and metadata.

Learn to move and rename files with the linux mv command, control overwriting with interactive and update options, and use wildcards for batch file operations.

Explore how to use the rm command to remove files and directories, including options like force and interactive prompts, using wildcards and handling nonexisting files and empty directories.

Explore how Linux supports a multiuser system by assigning users to groups and applying rwx permissions to files for owner, group, and others, with superuser access.

Master Linux file permissions by decoding owner, group, and others rights (read, write, execute) and translating them into octal notation to apply with chmod.

Master file ownership and access control by using chmod to grant or remove read, write, and execute permissions for user, group, and others, in symbolic and numeric forms.

Change file ownership and group with chown and chgrp, modify permissions with chmod, and observe how owner and group access controls affect permissions in a multi-user environment.

Learn to read and concatenate files with the cat command, and create or overwrite files using redirection. Explore displaying newlines, numbering lines, and tailoring output options.

Learn to use the Linux head and tail commands to display the first or last lines or bytes of a file, adjust with options, and redirect output to another file.

Learn how to use the Linux more and less commands to read files page by page, navigate, search patterns, and manage multiple files with wildcards.

Master the linux sort command by ordering file lines, adjusting spaces and case with -b and -f, and using -k and -t for column-based, delimiter-aware, and unique sorting.

Explore the wc command to count lines, words, bytes, and characters, and learn how -l, -w, -c, -m, and -L reveal line length and counts.

Explore how the tee command writes input to both standard output and a file, enabling visible on-screen output while saving data for later analysis.

Learn tar, the tape archive utility, to bundle multiple files into a single archive and extract it with common options. Explore creating archives with specified files and comparing compression algorithms.

learn how to create and extract zip archives using various options, including adding files with wildcards, checking contents, updating, deleting, and encrypting archives, with recursive and exclude options.

learn how processes create a multitasking system where programs contend for cpu, yet only one runs at a moment, cycling through running and sleeping states via round-robin scheduling.

Learn about the proc directory, a highly dynamic part of the system that tracks running processes and the current state of Linux.

Explore the ps command as a process snapshot tool, listing terminal processes, PIDs, user IDs, and CPU/memory details, and learn to locate or kill processes with related options.