A warm welcome to the Linux Basics and Shell Programming course by Uplatz.

In Linux and other UNIX-based operating systems, the shell is an interactive interface that allows users to run additional commands and tools. When you log in to the operating system, you'll see the normal shell, which lets you do things like copy files and restart the machine. Because they also operate as a programming language with a full set of tools, Linux shells are far more powerful than the Windows command line. Multiple shells can be installed on a machine, and they can be switched between rapidly.

The term shell refers to the interface between a user and an operating system service in UNIX. Shell offers a user interface and takes human-readable instructions into the system. It then executes those commands that can run automatically and outputs the program as a shell script. A shell in the Linux operating system accepts instructions from the user, processes them, and then returns an output. It is the user interface that allows a user to interact with programs, instructions, and scripts. A shell can be accessed through a terminal, which also executes it. Shell scripts are widely used for a variety of system administration activities, including disc backups, system log analysis, and so on. They're also frequently utilized as sophisticated application installation scripts. They're ideal for all of them since they allow for complexity without necessitating it.

This Linux Basics with Shell Scripting training by Uplatz will teach you everything from the fundamentals of the Linux/Unix shell scripting software to advanced Shell Scripting ideas. This lesson is intended for both beginners and experts who wish to learn what Shell Scripting is and how to use it. What is shell scripting, what are the many sorts of shells, and so on.

Course Objectives

• Master the Linux fundamentals

• Handle text, files, and directories

• Write shell scripts

• Handle input/output

• Change file ownership and permissions

• Handle processes

• Filename, variable command, and arithmetic substitutions

• Conditional statements, loops

• Functions

• Grep: Text filters and regular expressions

• Shell utilities: search, sed, lsof, curl, wget, and ssh

• Introduction to awk scripts

Linux Basics and Shell Scripting - Course Syllabus

1. Introduction to Unix/Linux

• Unix and its history

• Introduction to Linux

• Login session

• Working with the Unix filesystem (Linux Directories)

• Linux Basic Commands (ls, pwd, cd, touch, mkdir, rmdir, cp, mv, cat, rm)

• Handling files and directories (with metacharacters)

• Working with vi (visual editor along with 3 modes)

• Linux documentation (along with manual sections including path)

2. File utilities

• Standard I/O, redirection and pipes

• File descriptors and its related usage of metacharacters (>, >>, <, <<, <<<)

• Changing file access rights (users and permissions including both Symbolic and Absolute modes) (chmod)

• Soft links and hard links

• Checking file integrity

3. Linux Utilities

• Disk utilities (du, df)

• Process utilities (ps and all options)

• Text processing utilities (head, tail, wc, find, grep etc)

• Miscellaneous commands

• Compressing and archiving (backup and restore) utilities

• User management, time management and shutdown (init levels)

4. System Administrative Basics

• Networking

• File systems and devices

• Accessing administrator (root) privileges

• Package management

5. Shells and Shell Programming (BASH)

• Command line interpreters and SSH

• Variables in shell (Local and Global (export))

• Environment variables

• How to write the script?

• Quotes (Single and Double along with variables)

• Test commands or [ expr ]

• Conditional statements (if … fi, if … else … fi, if … elif … else … fi, case statement)

• Repetitive statements (for and while loops)

• Conditional execution (&& and ||)

• Functions

• Signal Handling (Default action, Handling Signals and Ignoring Signals)

• Commands such as kill, trap, shift

• Command line processing and command line arguments

• Processing command line options (getopts)

• Utilities: cut, join, tr, awk, sed, uniq, grep