Linux Essentials for Beginners

Set up your hypervisor and a virtual machine, then master Linux basics like file navigation, creation, deletion, scripting, input/output, and redirection in the command line and text editors.

Master Linux essentials for beginners by installing VMware Workstation Player on Windows and running an Ubuntu virtual machine through step-by-step download, install, and configuration guidance.

Set up a macOS environment by installing VMware Fusion and obtaining a free license. Create an Ubuntu virtual machine from an ISO to run Linux essentials.

Explore the Linux command line basics, including navigation with cd, listing with ls, reading files with cat, and creating or deleting files with touch and rm on an Ubuntu VM.

Master Linux file management and directory navigation using touch, rm, cp, mv, and mkdir, with practical examples of cd, dot, dot dot, and printing the working directory.

Learn to create non-empty files in the Linux terminal using nano or vim, save and exit with keyboard shortcuts, and use echo to write text to files.

learn to automate repetitive tasks with bash scripting by using for loops, variables, and echo commands; practice building simple one-liner scripts and understand script structure.

Learn to automate file creation with a bash for loop: create ten empty files named file1 through file10 using touch in a dedicated documents directory.

Turn a text file into an executable bash script by adding a shebang and setting executable permissions, then run it from the current directory.

Learn bash scripting in Linux essentials for beginners by accepting user arguments with $1 and $2, using variables, echo, and a shebang with executable permission.

Learn to write a bash for loop in a script, using an index from 1 to 100 and echoing each value, with a shebang and comments, making the script executable.

Learn how to use input and output redirection in linux, including creating and overwriting files with >, appending with >>, and capturing errors with 2>.

Explore the conceptual overview of searching with the find command versus grep. Learn wildcard and bracket patterns and how to search by name, size, and dates.

Learn to use the find command to search the current directory by name, apply regular expressions and wildcards, and explore example dog files while reviewing the man page.

Master the find command with wildcards, question marks, and brackets to locate files by name and size, including hidden ones and zero-byte files, starting from the root.

Explore how grep dives into files to search for content, unlike find which locates files. Use -n for line numbers and -R for recursive searches across directories.

Install curl, then learn to pipe command output to grep to filter page source lines. Explore curl as an http client and practice piping in the Linux command line.

Learn how exit status codes indicate command outcomes, with zero for success and one for errors, plus examples of 126 and 27, and redirecting errors to /dev/null in scripts.

Explore the Linux command line basics, including essential commands like cd, ls, grep, and find, and preview topics on data storage, processes, and locating them in the system.

Discover how Linux stores data, monitor active processes with top, track memory and CPU usage, and stop processes; explore system messages, vim configuration, and login logs.

Learn to use the ps command to get a snapshot of currently running processes, identifying pid, tty, and cpu time while exploring useful options.

Learn to use ps with options like awacs to view processes, including user, PID, CPU%, MEM%, and status. Use grep to filter and kill a parent to terminate its children.

Explore the top command, a real-time, dynamic view of processes that updates every second, showing CPU and memory usage, swap status, tasks, and user-based filtering for system insight.

Learn to use df, du, and free to inspect disk usage and memory. Explore human-readable outputs, root filesystem focus, and permission considerations with sudo.

Explore how to use dmesg to view kernel messages for troubleshooting, learn how to filter logs with grep and last, and understand how logs persist in /var/log for later review.

Explore the syslog concept and core system directories, including /etc for configuration, /var/log for event logs, /boot, /proc, /dev, and /sys, and understand device types and process information.

Explore the /var/log directory to view autolog and syslog, which capture authentication events and system activity. Inspect the /etc/vim/vimrc for settings and /proc to observe processes and session IDs.

Learn to use debugging commands to diagnose memory and CPU bottlenecks and manage processors, and examine system messaging, Vim rc, and kernel logs to locate stored information.

Explore basic networking in Linux and master essential commands like ifconfig and ip. Learn to configure networks and understand DNS and the domain name system.

Learn how IP addresses uniquely identify devices on networks, using IPv4's 1.2.3.4 format and IPv6's colon-separated groups, with DNS translating names into these numbers.

Understand how the internet works from client requests to server responses, how DNS translates domain names into IP addresses, and how routers and routing tables direct traffic in Linux.

Explore how the route command edits the routing table, add static rules, and manage traffic by configuring destinations, gateways, and interfaces, with demonstrations of enabling and deleting routes.

Explore the differences between ifconfig and ip commands for managing Ubuntu network interfaces, including up and down states, IPv4/IPv6 addresses, and loopback, with practical viewing and toggling examples.

Learn to use the netstat command to view open ports, running services, and active connections, plus routing info, interface ips, TCP/UDP filters, listening sockets, and process IDs.

Learn how to use the ss command to display socket information similar to netstat, including listening ports, receive and send queues, and the responsible processes.

Learn how to use the ping command to test connectivity with ICMP requests, read TTL and 64-byte responses, and script IP range pings for troubleshooting and security insights.

Learn how the host command performs DNS lookups to map domain names to IPv4 and IPv6 addresses and reveal record types like MX and NS with verbose and type options.

Edit the /etc/hosts to map an IP like 10.10.10.x to a hostname such as Ryan, enabling local name resolution and ping via the alias, with sudo privileges.

Explore Linux file permissions, including read, write, and execute, how they are represented and the default settings, and apply security best practices and least privilege for secure systems.

Explain Linux file permissions: read, write, execute; owner, group, world; numeric values like 7, 5, 4; and introduce least privilege, temporary files, and hard vs symbolic links.

Learn how to use sudo and su to run commands as the super user, switch to root, and perform privileged actions with password prompts.

Change file ownership and permissions using chown, chgrp, and chmod, exploring numeric and symbolic notations to grant or restrict rights for owner, group, and others, emphasizing least privilege.

Learn to add a user with useradd, add a group with groupadd, verify changes in /etc/passwd and /etc/group, and use sudo to run privileged commands.

Explore four essential Linux commands—last, id, who, and w—that reveal login history, user and group details, and current activity to monitor system access and privileges.

Learn how to create symbolic links with ln -s, verify with ls -l and cat, and remove them with unlink, linking files under multiple names.

Create and manage users and groups, set file ownership and access permissions, and apply security best practices while completing a hands-on section challenge with owner, group, and world permissions.

Reach section five, the final segment of this module, as we cover advanced one line sequences and dive deeper into editors, preparing you for the next video.

Learn base64 in Linux by encoding and decoding a string using the base64 command, then echo and pipe to decode, and compare results with Cyber Chef encoding tool.

Learn to manipulate Linux log output using wc, cut, and tr to count lines, extract columns with a colon delimiter, and remove spaces and lowercase text for clean data.

Learn to generate and verify file hashes in Linux using md5sum, sha256sum, and sha512sum to ensure integrity, detect changes, and protect downloads from tampering.

Learn to extract and clean IP addresses from logs using cut, tr, sort, uniq, and head or tail, producing concise, unique results for IP logs.

Learn to use nl to number lines, sed to delete line ranges, and pipe commands, then verify file types with the file command and note Linux vs Windows extension differences.

Split a phone book into phone numbers, names, and addresses with split -l, then paste them into a grid; explore octal encoding with od -b and viewing with less.

Master vim shortcuts: enter insert mode, delete lines or words, move with j/k or arrows, undo with u, redo with ctrl-r, and save or quit with :wq or :q!.

Explore exporting environment variables with the export command, view exported variables, and use them with echo and dollar signs, then check Linux and Ubuntu details with uname.

Modify information, sort unique values, trim, and cut text in Linux. Explore hashing with MD5, SHA256 sums and SHA512 sums, then pasting, splitting, and Vim basics.