Where Online Learning is Simpler!
THE DIRECT PATH TO LINUX UBUNTU
Table of Contents (web + documentation links). Select a chapter to start learning.
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Preface
Chapter 1
About UNIX and Linux Operating Systems
Chapter 2
Basic UNIX and Linux Commands
Chapter 3
Intermediate UNIX and Linux Commands
Chapter 4
Advanced UNIX and Linux Commands
Chapter 5
UNIX and Linux Shell Scripting
Chapter 6
UNIX and Linux Web Servers
Chapter 7
Search for LINUX Manual Pages Dynamically
Chapter 8
Linux Ubuntu Manual Pages in PDF Format
Chapter 9
The C and C++ Include Header Files
Chapter 10
The Linux Rocky Release 9.2 Manual Pages
Chapter 11
The Red Hat Enterprise Linux Release 9.2 Manual Pages
Chapter 12
Dynamic Generation of Linux Ubuntu Manual Pages in PDF Format
Chapter 13
The Linux Ubuntu Manual Pages in PDF Format
Chapter 14
Linux Ubuntu BASH and Microsoft PowerShell Integration (pwsh)
Chapter 15
Learn Linux Ubuntu Online
Chapter 16
The Linux Ubuntu 26.04 Manual Pages in PDF Format
Chapter 17
Long Video Lectures – MyWebUniversity (English)
Chapter 18
Long Video Lectures – MyWebUniversity (Dari / دری)
Chapter 19
Quick Tips & Short Tutorials — English
Chapter 20
Quick Tips & Short Tutorials — Dari / دری
Chapter 21
Linux Man Pages Online — PDF & HTML 9,078 Ubuntu 26.04 LTS man pages — Shell, Python, Java, Go, Node, Ruby, MySQL & more.
Chapter 22
GCC C Language — Headers, Functions & Code Examples
Complete C Standard Library reference —
stdio.h, math.h, string.h,
stdlib.h, ctype.h, stdint.h,
unistd.h and more. Full function signatures,
descriptions, and ready-to-compile GCC examples with copy button.
Chapter 23
G++ C++ Language — Headers, Namespaces & Code Examples
Complete C++ Standard Library reference —
<iostream>, <vector>,
<string>, <map>,
<algorithm>, <memory>,
<thread> and more. Covers the std
namespace, std::cout, std::cin,
smart pointers, lambdas, templates, and OOP with copy-paste examples.
Chapter 24
Go Programming Language — Packages, Functions & Code Examples
Complete Go Standard Library reference —
fmt, os, io,
strings, strconv, math,
time, net/http, sync,
bufio and more. Covers goroutines, channels,
structs, interfaces, error handling, HTTP client & server,
JSON parsing, and concurrency with copy-paste examples.
Built and tested with Go 1.22 on Ubuntu Linux.
Chapter 25
Java Programming Language — Classes, Collections & Code Examples
Complete Java core reference —
java.lang, java.util,
java.io, java.util.stream, java.net.
Covers String, ArrayList, HashMap, Optional, Streams API, BufferedReader,
HttpClient, OOP, generics, lambdas, and multithreading with copy-paste examples.
Chapter 26
Ruby Programming Language — Classes, Modules & Code Examples
Complete Ruby built-in reference —
String, Array,
Hash, File & IO, Enumerable.
Covers blocks, procs, lambdas, OOP with mixins, regex, CSV processing,
and concurrency with threads and fibers. Copy-paste examples for Ruby 3.3.
Chapter 27
Rust Programming Language — Ownership, Traits & Code Examples
Complete Rust standard library reference —
std::io,
std::fs, std::collections, std::thread,
Option & Result. Covers ownership, borrowing,
traits, generics, iterators, closures, async/await, and safe concurrency.
Chapter 28
Perl Programming Language — Regex, File I/O & Code Examples
Complete Perl reference — core built-ins, regex engine, file I/O,
and
DBI database interface. Covers grep, map,
sort, named captures, lookaheads, CGI scripting, OOP with
bless, and powerful one-liners for system administration.
Chapter 29
R Programming Language — Data Science & Statistical Computing
Complete R reference — base R vectors and data frames,
dplyr
data manipulation, ggplot2 visualization, and the stats
package. Covers linear models, t-tests, ANOVA, machine learning with
caret, and interactive apps with Shiny.
Chapter 30
JavaScript & Node.js — ES6+, Async, DOM & Code Examples
Modern JavaScript reference — ES6+ features,
Array methods,
Promise, async/await, fetch, DOM manipulation,
localStorage, and Node.js with fs, http,
path, and Express.js. Copy-paste examples for browser and server.
Chapter 31
HTML5 & CSS3 — Semantic Markup, Flexbox & Grid
Complete HTML5 and CSS3 reference — semantic elements, forms, media,
CSS custom properties (variables), Flexbox layout, CSS Grid, animations,
transitions, responsive design with media queries, and accessibility with ARIA.
Chapter 32
JSON — Syntax, Parsing, Schema & Code Examples
Complete JSON reference — syntax and data types,
JSON.parse
and JSON.stringify in JavaScript, json.loads and
json.dumps in Python, jq command-line processing,
JSON Schema validation, and REST API patterns. Copy-paste examples.
Chapter 33
XML — XPath, XSLT, XSD & Code Examples
Complete XML reference — syntax, namespaces, CDATA, XPath navigation,
Python
ElementTree and lxml, XSLT transformations,
XSD schema validation, and XML-to-JSON conversion. Copy-paste examples.
Chapter 34
YAML — DevOps, Kubernetes, Ansible & Code Examples
Complete YAML reference — syntax, multiline strings, anchors and aliases,
PyYAML in Python, Kubernetes manifests, Docker Compose, Ansible playbooks,
GitHub Actions workflows, and comparison with JSON and TOML. Copy-paste examples.
Chapter 35
SQL Databases — MySQL, PostgreSQL, SQLite & Code Examples
Complete SQL reference —
SELECT, JOIN,
GROUP BY, WITH (CTEs), window functions, transactions,
indexes, and schema design. Covers MySQL, PostgreSQL, SQLite, and Python integration
with sqlite3, psycopg2, and SQLAlchemy ORM.
Chapter 36
LDAP & Directory Services — OpenLDAP, Active Directory & Examples
Complete LDAP reference — DIT structure, Distinguished Names, LDIF format,
ldapsearch, ldapadd, ldapmodify,
Python ldap3 library, Active Directory queries, OpenLDAP installation,
TLS configuration, and LDAP authentication integration.
Chapter 37
Cloud Computing — AWS, Azure, GCP & Architecture
Complete cloud reference — IaaS/PaaS/SaaS service models, VPC networking,
subnets, security groups, IAM roles, EC2, S3, Lambda, CloudWatch monitoring,
cost optimization, and cloud security best practices. Covers AWS, Azure, and GCP
with CLI and Python SDK examples.
Chapter 38
Ansible & OpenShift — Automation & Container Orchestration
Complete Ansible and OpenShift reference — playbooks, roles, inventory,
vars, handlers, Ansible Vault, 30+ modules including
apt, template, service, copy,
and Jinja2 templating. OpenShift oc CLI, Kubernetes deployments,
routes, and Source-to-Image builds.
Chapter 39
AWS & Azure — Cloud Services, CLI & Python SDK
Complete AWS and Azure service reference — EC2, S3, RDS, Lambda, API Gateway,
CloudFront, Route 53, IAM, CloudFormation, SQS, SNS, and ElastiCache on AWS.
Azure VMs, Blob Storage, SQL Database, Functions, AKS, Key Vault, and Azure AD.
AWS CLI, Azure CLI, boto3, and Azure Python SDK with copy-paste examples.
Chapter 40
Docker & Podman — Containers, Images & Compose
Complete Docker and Podman reference —
docker run, build,
push, exec, logs, volumes, and networks.
Dockerfile best practices: multi-stage builds, layer caching, non-root users,
security scanning. Docker Compose for full-stack applications with health checks
and dependency management.
Chapter 41
Apache & NGINX — Web Servers, SSL & Reverse Proxy
Complete Apache and NGINX reference — VirtualHost configuration,
mod_rewrite URL rewriting, SSL/TLS with Let's Encrypt, CGI script
deployment, compression, caching headers, and security headers. NGINX server
blocks, proxy_pass reverse proxying, upstream load balancing,
rate limiting, and HTTP/2.
Chapter 42
Protocols, APIs & Security — HTTP, TLS, SSH, OAuth2 & Cybersecurity
Complete protocols and security reference — HTTP methods and status codes,
TLS 1.3 handshake, OpenSSL certificate management, Let's Encrypt, SSH key
authentication, tunnels,
rsync, REST APIs with curl,
OAuth2, JWT, SAML, MFA, RBAC, Kerberos, FreeIPA, and OWASP Top 10 security
with Linux hardening and fail2ban.
Chapter 43
Networking — OSI Model, TCP/IP, DNS, Firewalls & WireGuard VPN
Complete networking reference — OSI 7-layer model, TCP vs UDP, IPv4 and IPv6
addressing, CIDR subnetting, NAT, DNS records (
A, MX,
TXT, CNAME), dig, nslookup,
network diagnostics with ping, traceroute, mtr,
ss, nmap, tcpdump, iptables,
ufw, and WireGuard VPN setup.
