Linux for Cloud & DevOps Engineers

Master essential Linux basics by using date, cal, uptime, who am I, and man to view system time, calendar, uptime details, and command manuals.

Explore how to view and read files in Linux using ls, pwd, cat, less, more, and head or tail to display line ranges and navigate content.

Learn to create and edit files in linux with touch, cat, nano, and vi, and master ls flags for long listing, time sorting, and reverse order.

Learn to create, edit, and append content to files on Linux using nano, vi, cat, and touch, including saving, overwriting, and appending techniques.

Learn to create and manage directories in linux with mkdir, switch into them using cd, view directories with ls -l to distinguish files and directories, and work with subdirectories.

Learn to remove files and directories with rm and rmdir, inspect structures using tree, and delete recursively with -r and -f, while backing up due to no recycle bin.

Learn how to copy files and directories using the cp command, including copying content between files, placing copies in directories, and using the -R option to copy directories recursively.

Learn how to move and rename files in Linux using the mv command, moving files between directories and renaming them, with practical examples and outcomes.

learn to use the cd command to switch directories with absolute paths from the root and relative paths via dot dot, move between root and tmp, check pwd.

Learn how to use find, diff, and file commands in Linux to locate files, compare contents, and identify file types. See practical examples with -name, -user, -group, and absolute paths.

Use grep to search for a word or pattern in a file and print matches. Use -i to ignore case and pipes to chain commands.

Use sed, the stream editor, to search and replace words in a file, apply global and case-insensitive options, perform in-place edits, and selectively display or delete lines.

Learn to create and manage Linux users using useradd and usermod, including root, system, and normal users, home directories, UID/GID, and adding users to groups or the Docker group.

Log in as the John user on an EC2 instance by enabling password authentication: edit sshd_config, reload ssh, and log in with the John password.

Explore how file and directory permissions control access, including read, write, and execute rights; learn how the owner, primary group, size in bytes, and timestamps define visibility.

Learn to change file and directory permissions with symbolic and numeric chmod, control owner, group, and others, and apply permissions to enable listing, editing, or creating files.

Learn how to change file ownership with chown, including owner and group, and understand file types with the file command, from ascii text to character, block, and symbolic links.

Learn how to manage software on Linux using yum and rpm, including installing, removing, updating, and listing packages from Red Hat repositories.

Learn to update, view info, and list packages with yum, compare installed and available packages, and inspect package details from the repository.

Learn essential Linux networking commands such as hostname, ping, wget, ifconfig, and curl, including how to view and change hostnames, test connectivity, and fetch content.

Identify IP addresses and port numbers on a Linux system, learn default ports like 22 for SSH, 23 for Telnet, 80 for HTTP, and verify ports with netstat and Telnet.

Explore services as processes that start and stop, configure boot behavior with config, and manage status, reload, restart, and port usage, exemplified by installing httpd and opening port 80.

Explore remaining service commands and chkconfig and systemctl, covering sshd and httpd setup, enabling at boot, and restarting, reloading, and verifying service status.

Understand how linux handles processes, including foreground and background jobs, and use ps, fg, bg, kill, and top to monitor and manage them. Learn about process IDs and parent IDs.

Archive files and directories with gzip, zip, and tar, noting tar handles directories while zip and unzip work on files, and use tar -xvzf to unzip and extract.

Learn soft links and hard links in linux, with ln -s creating shortcuts and ln making backups. Soft links break if the original is deleted, while hard links persist.

Learn how to securely copy files and directories between Windows and Linux, and between Linux systems, using scp, mobile xterm, and ssh-based tools like sftp and winscp.

Discover how SSH key-based authentication works, generate and deploy public and private keys, and configure authorized_keys for passwordless, automated logins across servers.