Linux Command Line: From Zero to Hero

Navigate the Linux file system using pwd, cd, and ls, and understand home and root directories, tilde shortcuts, absolute versus relative paths, and ls options including -a and -l.

Learn to create folders and files in Linux using mkdir, touch, echo, and cat; navigate with cd and ls, handle permissions with sudo, explore case sensitivity, and nested paths.

Master basic file operations in Linux by copying with cp, moving and renaming with mv, and removing with rm, including recursive and force options, and verifying results with tree.

Learn to view text files in Linux with more, less, head, and tail using practical navigation and search options, while preparing the workspace with rm, wget, and mv.

Master nano, a user-friendly text editor, explore its interface, save with Ctrl+O, exit with Ctrl+X, and undo with Alt+U, while using -B backups, line jump, copy-paste, and search-and-replace.

Master the find command to locate files in linux using patterns like * and ?, with case-insensitive -iname searches, and refine results with -maxdepth and -size.

Learn how to view user information and groups with who am I, id, and groups; switch to other users with su and sudo, and understand root access safety.

Discover how to create Linux users with useradd and adduser, manage home directories, groups, shells, and passwords, and inspect /etc/passwd, /etc/group, and /etc/shadow.

Learn to manage Linux users using useradd and usermod to create, modify, lock or unlock accounts, set home directories and shells, and avoid direct edits to passwd and shadow.

Master group management in Linux by creating groups with group add, adding users via usermod -a -G, and removing groups with group del, while verifying changes in /etc/group.

Explore file permissions in Linux, decode the 10-character mode string, and use chmod to set owner, group, and others rights with symbolic and numeric approaches, including recursive application.

Explore how input output streams control data in the Linux terminal, using echo and cat to create, display, and append files, redirect stdout and errors, and find files by pattern.

Explore the Linux command processing pipeline by piping cat into wc and grep, using find, head, sort, and unique to count lines and words.

Learn to monitor server health with the top utility in Linux, understand load averages, RAM, swap, process states, and how to filter, sort, and kill processes.

Master Linux process and service management with htop, ps, kill, and systemctl, including installation, signal usage, and starting, stopping, and reloading services.

Learn how apt and apt-get manage Linux packages from repositories, covering install, update, upgrade, remove, purge, source and download workflows, plus dpkg, snap, flatpak, and aptitude basics.

Learn how Linux package managers install, remove, and search for software. Add a repository via sources.list.d and apt to reinstall VirtualBox, using the jammy codename.