Tiêu đề Linux Complete Note by Ajay Mahato.pdf ✅

w w w . n o t e d i n s i g h t s . c o m A j a y M a h a t o Table of Contents Unit 1: Introduction to Linux and CLI Commands.............................................................1 1.1 Introduction to Open-Source Software ......................................................................1 1.2 Introduction to UNIX System....................................................................................2 1.3 Difference Between Unix and Linux .........................................................................4 1.4 What is Linux Operating System? .............................................................................5 1.5 What are Shell Commands in Linux? ........................................................................9 1.6 Comprehensive Overview of Linux Commands......................................................12 1.7 Job Control...............................................................................................................15 1.8 What is the Linux File System.................................................................................17 1.9 Some HandsOn Example on Linux File System......................................................22 1.10 Package Management ..............................................................................................24 Unit 2: Installation, Boot Process and User Administration..............................................33 2.1 How to Install Linux Mint?......................................................................................33 2.2 How to Install Linux Over a Network .....................................................................37 2.3 The Linux Booting Process - 6 Steps.......................................................................42 2.4 User Management in Linux .....................................................................................47 2.5 Group Management in Linux...................................................................................50 2.6 Password Policy for Linux Devices.........................................................................53 2.7 File Permissions in Linux ........................................................................................57 2.8 Access Control Lists(ACL) in Linux.......................................................................64 Unit 3: Disk Quotas, Storage Management, and Network Configuration........................68 3.1 User Quotas in Linux...............................................................................................68 3.2 Configuring RAID Arrays on Linux for Data Redundancy.....................................72 3.3 LVM in Linux ..........................................................................................................78 3.4 What is an inode?.....................................................................................................85 3.5 IPv4 and IPv6 Addresses .........................................................................................89 3.6 Configuring IPv4 and IPv6 Addresses in Linux ......................................................95 3.7 Network troubleshooting Tools in Linux.................................................................98 Unit 4: Network Services and File Sharing .......................................................................105 4.1 DNS and DHCP Configuration,.............................................................................105 4.2 Hostname Resolution............................................................................................. 111
w w w . n o t e d i n s i g h t s . c o m A j a y M a h a t o 4.3 DNS Queries..........................................................................................................113 4.4 Implementing Servers............................................................................................116 4.5 How to setup and configure an FTP server in Linux? ...........................................121 4.6 NFS and Samba in Linux.......................................................................................127 4.7 Directory Access....................................................................................................129 4.8 Secure File Sharing Over a Network .....................................................................132 Unit 5: Web, Email, Database Services, and Network Security ......................................135 5.1 Apache & HTTPD .................................................................................................135 5.2 How to Set Up a Mail Server with Postfix and Dovecot on RHEL.......................138 5.3 MySQL Administration..........................................................................................141 5.4 Securing Systems Using SSL/TLS, Cryptography, SSH, and Firewall.................144 5.5 Implementing ACLs and Anti-Spam Measures for Security on RHEL.................149 5.6 Troubleshooting and Resolving Issues in Servers and...........................................154
Unit 1: Introduction to Linux and CLI Commands w w w . n o t e d i n s i g h t s . c o m 1 | A j a y M a h a t o Unit 1: Introduction to Linux and CLI Commands 1.1 Introduction to Open-Source Software The term Open-source is closely related to Open-source software (OSS). Open-source software is a type of computer software that is released under a license, but the source code is made available to all the users. The copyright holders of such software allow the users to use it and do some valuable modifications in its source code to add some new features, to improve the existing features, and to fix bugs if there are any. Because of this reason only Open-source software is mostly developed collaboratively. 1.1.1 Some famous examples of Open-source products are: • Operating systems – Android, Ubuntu, Linux • Internet browsers – Mozilla Firefox, Chromium • Integrated Development Environment (IDEs) – Vs code (Visual Studio Code), Android Studio, PyCharm, Xcode 1.1.2 Open-source community and Contributions: The open-source community is a worldwide community of programmers and software developers who are continuously working on various open-source projects to make our lives better. This community is self-governing and self-organizing, there are no executives to take the decisions solely. This community plays a very crucial role in the sustainability of various open-source organizations. The contributions made in any open-source project which improves its usability are called open-source contributions. These contributions can be of any form not only some software codes like we can work on improving its documentation, improving its UI/UX (user interface and design), organize meetups, or find new collaborators. 1.1.3 Benefits of Open-source contributions: • We code for real-world open-source projects. • It refines our existing knowledge of programming and also helps us to learn new skills. • Many open-source projects offer mentorship programs to guide and help us through our first few contributions. • We need not develop the whole thing from scratch, we just have to fork our favorite projects and start experimenting with them. • After making any open-source contribution, we get immediate feedback regarding our developmental work.