Scripting

>> Usage of Compgen Command in Bash

>> How to Properly Format the Source of a Shell Script

>> Matching Uppercase and Lowercase Letters With Regex in Shell

>> How to Setup a Development Environment for Shell Scripting in Linux

>> How to Operate on Files Listed in a File

>> How to Print an RFC-3339 Format Date

>> Copying Hidden Files Recursively

>> Print a Range of Numbers from the Linux Command Line

>> Use of BEGIN and END Rules in Awk

>> How to Replace a Character in a Matched Line In-Place

>> How to Obfuscate a Bash Script to Make It Unreadable

>> The Shell Prompt and How to Correct For Missing Newlines

>> How to Pass Arguments From a File to a Bash Script

>> How to Use grep in an if-else Statement in Bash

>> How to Remove Lines That Contain Fewer Than n Characters

>> Guide to Multiplying Columns Using awk

>> The Default Sorting Order of the find Command

>> Solving the Error “sh: 0: getcwd() failed: No such file or directory”

>> How to Automatically Switch to the Git Directory After Cloning

>> How to Append a String Variable to Itself in Bash

>> Copying Files With Different Specific Extensions Using the find Command

>> How to Delete Text Before a Delimiter From the Command Line

>> Waiting for the Network Being Up in a Bash Script

>> How to Embed a Shell Command Into a sed Expression

>> Check if a Bash Array Contains a Value

>> What’s the Difference Between Bash’s set and export?

>> sed Print to Standard Output When Editing In-place

>> How to Use the Ternary Conditional Operator in Bash

>> Checking the Signals a Process Is Listening To

>> CMake for Cross-Platform Compilation

>> How to Remove an Element From an Array Completely in Bash

>> Remove All Comments From a Bash Script in the Shell

>> HTML Parsing for Extracting Text Between HTML Tags in the Shell

>> Showing the Definition of a Function in Bash

>> Guide to Converting Timestamps in a Column to a Date

>> How to Convert a Date Format to Another Format

>> Zero Padding in the Shell

>> How to Convert Binary to Hex and Decimal in the Shell

>> How to Execute a Shell Script When a USB Device Is Plugged

>> What’s the Meaning of $! in Bash Scripting

>> The Linux hash Command

>> Extract Text Between Two Specific Characters in the Command Line

>> How to Run a Command in the Background With a Delay

>> Store Paths and Change Directory With a Variable in the Shell

>> How to Convert a Shell Script Into a Binary Executable

>> How to Split Only on a Newline in Shell

>> Matching Multiple Conditions in One case Statement in Shell

>> Storing the Output of watch to a File

>> How to Check Whether Date Argument Is in the yyyy-mm-dd Format

>> Avoiding the nohup Command’s Input/Output Message

>> Hiding the Output of expect

>> Command Line Charting and Plotting Tools

>> Pinging Multiple IP Addresses or Hosts With One Command

>> Guide to Passing Bash Variables to jq

>> How to Make Tab Auto-Completion Case-Insensitive in Bash

>> Formatting Text in Linux Terminals

>> Print the Count of Lines Together With a Command’s Output

>> How to Run the time Command on Multiple Commands

>> Using $RANDOM to Generate a Random String

>> Getting Speech Output From Entered Text From the Command Line

>> Difference Between Executing Multiple Commands with && and ;

>> How to Prepend a Timestamp to the Output of a Command in Linux

>> How to Use a Regex Inside an if Clause in Bash

>> How to Use Shell Variables in an AWK Script

>> The Pipe Buffer Capacity in Linux

>> Extracting Frames From a Video Using FFmpeg

>> How to Create a Shortcut to Execute a Shell Script in Bash

>> How to Extract “n” Characters Before and After a Match in Shell

>> How to Do Nothing for an Indefinite Amount of Time in Shell

>> Read a WebSocket Response in Linux Shell

>> Mouse Events and Input Event Interface in Linux

>> Fine-Tuning and Parameterization of FFmpeg Render Process

>> Guide to Passing Parameters to an Awk Script

>> How to Extract the Base Filename From a URL in Shell

>> How to Trim Whitespace From a Bash Variable

>> Checking Weather from the Command Line

>> How to Call One Shell Script From Another

>> Reversing the List of Words in a Bash String

>> What’s the Difference Between bash script.sh and ./script.sh

>> How to Compile Code from Vim

>> Convert Text to PDF From the Command Line

>> The wait Command in Linux

>> How to Read Log Files Between Two Dates

>> How to Store Standard Error in a Linux Variable

>> IP Address Geolocation Lookups on Linux With GeoLite2

>> Iterate Over a Range of Numbers Defined by Variables in Bash

>> Iterating in Reverse Using for Loops and Other Constructs

>> Cleartext Passwords in the Shell and How to Handle Special Characters

>> Printing awk Output in the Same Line

>> “Illegal option -o pipefail” While Using the set Command

>> Using nohup With a for Loop

>> Encrypted Remote Backups via rsync

>> Print Decimal as ASCII Using the Shell

>> How to Filter strace’s Output Using grep

>> How to Check the Existence of Input Argument in a Bash Script

>> Parsing, Validating, and Printing JSON in Shell Scripts

>> Shell Auto Completion in Linux

>> How to Iterate Over a List of Strings in a Shell Script

>> Line Endings and Resolving the configure: /bin/sh: bad interpreter Error

>> Filter Processes by Process Names With top

>> Replacing Specific Line With a String Variable in Shell

>> Executing Multiple Commands in Find -exec

>> Augmenting the Default Search Path for Python

>> How to Process a Bash Variable With sed

>> Path of Bash Script From Symbolic Link

>> Different Types of Shebang in Linux

>> In What Order Do Piped Commands Run?

>> Idling and Dummy Executable Files That Do Nothing in Linux

>> Convert INI File Into a Bash Array

>> Generating Keys Without a Passphrase with OpenSSH, PuTTY, and OpenSSL

>> Decoding Encoded URLs in Linux

>> How to Use which on an Aliased Command

>> How to Run a Cron Job Periodically Between a Time Range

>> How to Use the Batch Mode of rsync

>> Using Colors With the watch Command

>> How to Retry a Failed Command in Shell

>> What Is the SSH known_hosts File and How to Temporarily Ignore It

>> Implementing a Command Line Progress Bar

>> Docker Compose: Wait for Container X Before Starting Y

>> PC Speaker Beep in Linux

>> Edit /etc/sudoers From a Script

>> How to Make Output Overwrite the Same Line in a Terminal

>> Check Whether a MySQL Database Exists Using Shell

>> Printing ASCII Art in the Shell

>> Run Cron Job Manually With Proper Environment

>> Execute Shell Commands and Silence Them in Vim

>> Indenting and Turning Off Auto Indent When Pasting Text Into Vi

>> Script to Automatically Test if a Website Is Available

>> How to Create a Random Human-Readable Text File in Linux

>> Compare Variables With Numbers in Bash

>> One Line if-else Condition in Linux Shell Scripting

>> Execute a Linux Command Without Keeping It in History

>> Run Multiple Commands in Docker CMD Directive

>> Creating UUIDs in Bash

>> Determine Whether a Shell Variable Is Empty

>> Interactive, Non-interactive, Login, Non-login Shells in Linux

>> Run a Shell Script Without Using “sh” or “bash” Commands

>> Recall the Previous Command or Its Arguments in Bash

>> Converting Strings to Numbers in the Linux Command Line Interface

>> Differences Between Single and Double Brackets in Bash

>> Setting Environment Variables for systemd Services

>> When to Avoid Using && in Shell Scripts

>> Bash Bitwise Operators

>> Waiting for a File in a Shell Script

>> Execute a Command Whenever File or Directory Changes

>> Why Looping Over find’s Output Is a Bad Practice

>> Check if Command Executed Successfully in Linux

>> How to Run Multiple Bash Scripts in a Terminal Window

>> Running a Script That’s Not Executable

>> Creating a Simple Select Menu in the Shell Script

>> Running a Command That Is Shadowed by an Alias

>> Checking Whether a Directory Exists in a Shell Script

>> Concatenate String Variables in Bash

>> Differences Between the return and exit Commands

>> Difference Between Sourcing and Executing a Shell Script

>> The set Command in Linux

>> Why Is Using a Shell Loop to Process Text a Bad Practice?

>> Script That Counts Files Then Removes the Oldest Ones

>> Retrieve Video Information on the Command Line in Linux

>> Compare Strings in Dot-Separated Version Format

>> List All Available Commands and Aliases in Linux

>> Split a List by Comma in Bash

>> Linux Shells Performance: dash vs bash

>> Safe Use of eval in Bash

>> Redirecting the Output of the time Command

>> Raise an Error in Bash Script

>> Handling Special Characters in Shell Scripts

>> rsync and Hidden Files

>> Hiding User Input in a Bash Terminal

>> Guide to Getting DST-Safe Relative Dates

>> The Difference Between #!/usr/bin/bash and #!/usr/bin/env bash

>> Reading/Parsing Properties File in a Linux Script

>> When to Wrap Quotes Around Arguments in a Shell Command

>> Suppress Echo of Command Invocation in a Makefile

>> How to Safely Exit from Bash Scripts

>> Print Statistics of Numbers on the Linux Terminal

>> Automating Telnet Sessions Using expect

>> Bash: let Statement vs. Assignment

>> The Conditional Variable Assignment Operator in a Makefile

>> Inserting a Newline in a Variable in Bash

>> Fixing the “/bin/sh: pushd: Not Found” Error in Linux

>> Iterating Over Each Line of ls -l Output

>> Substitute Shell Variables in a Text File

>> Division with Variables in a Linux Shell

>> Automatically Capture Output of the Last Command Into a Variable Using Bash

>> What Is a Sysroot?

>> Downloading Content Using wget Without Following Redirects

>> Using the passwd Command from Within a Shell Script

>> Checking if a Variable Is a Number in Bash

>> The /bin/true and /bin/false Commands in Linux

>> Kill a Child Process After a Given Timeout in Bash

>> Run a Script With a Different Working Directory

>> How to Write Stdout to a File with Colors

>> Flow Control in Bash Without Goto

>> Round a Divided Number in Bash

>> Use the Lines of a File as Arguments of a Linux Command

>> Set Environment Variables for a Bash Command

>> Find the Script’s Filename Within the Same Script in Bash

>> Configure a Systemd Service to Restart Periodically

>> How to Write Bash Variable Contents to a File

>> Using grep on a Continuous Stream

>> Read Values Into a Shell Variable From a Pipe

>> Linux Command-Line Tools to Take Website Screenshots

>> Replacing Whitespaces With Tabs in a File in Linux

>> Return Value of Substitutions With sed and awk

>> Merging Images in the Linux Terminal

>> Use of Dash “-” in Command-Line Parameters

>> xargs With Multiple Arguments

>> Include Files in a Bash Shell Script With source Command

>> Restrict Commands for SSH Users

>> Solving The “Cannot Open Shared Object File: No Such File Or Directory” Error In Linux

>> Start Script After Another Finishes in Linux

>> Run Bash Script as a Daemon

>> POSIX Shell Array/List Data Structure

>> Convert Hex to ASCII Characters in the Linux Shell

>> Expand a Relative Path in Bash

>> How to Run Bash Commands From a Text File

>> Get Bash Script Location From Within the Script

>> How to Remove Non UTF-8 Characters From a File

>> Pipe Output to Bash Function

>> Parse Command Line Arguments in Bash

>> Running a Shell Script on a Remote Machine Through SSH

>> Escaping Characters in Bash

>> Debugging Programs Using the GDB Command

>> Testing Bash Scripts With Bats

>> Segmentation Fault in Linux

>> Get Unique Values from an Array in Bash

>> Checking if a Linux Environment Variable Is Set or Not

>> Looping Through the Content of a File in Bash

>> Show Line Number When Executing a Bash Script

>> Using the Exclamation Mark (!) in Bash

>> Using 2D Arrays in Bash Under Linux

>> Removing the Last Character of a File

>> Check if a Variable Exists in a List in Bash

>> Escape a Single Quote in Single Quote String in Bash

>> How to Create an Alias in Linux

>> List Environment Variables in Linux

>> Simulating the Enter Keypress in Bash Scripts

>> Bash – Using History Efficiently

>> Filtering Only the Standard Error in Linux

>> Using printf and echo in Linux

>> How to Create a CPU Spike in Bash

>> Get the Path of a Linux Command

>> Restart a NoSQL Database Like MongoDB

>> Check the Syntax of a Bash Script Without Running It

>> Identify User in a Bash Script Called by sudo

>> Delete an Exported Environment Variable in Shell

>> Create Bash Alias That Accepts Parameters

>> Extracting a Substring in Bash

>> Clear a Terminal Screen in Linux

>> How to Add Up a Column of Numbers in Bash

>> Solving the “Unary Operator Expected” Error

>> Standard Exit Status Codes in Linux

>> Concatenate Two Strings to Build a Complete Path in Linux

>> Get Exit Code of a Background Process

>> Kill a Process Running on a Specific Port in Linux

>> Aborting a Shell Script if Any Command Fails

>> Display Specific Columns From a File in Linux

>> Difference between ${} and $() in Bash

>> Preserve Linebreaks When Storing Command Output to a Variable

>> Bash Script to Calculate Time Elapsed

>> Iterate Over a List of Files With Spaces in Their Names in Linux

>> File Editing: Appending a Non-Existent Line to a File

>> How to Insert a New Line Character in Linux Shell Script Output

>> Linux Bash: Multiple Variable Assignment

>> Showing a GUI Notification From a Shell Script in Linux

>> Storing a Command in a Variable in a Shell Script

>> Run a Script on Startup in Linux

>> Negate an if Condition in a Bash Script

>> When to Use an Alias vs Script vs a New Function in Bash

>> Using sed With a Literal String Instead of an Input File

>> Difference Between .bashrc, .bash-profile, and .profile

>> How to Create a crontab Through a Script

>> Pass the Output of a Command as an Argument for Another

>> Ensure Only One Instance of a Bash Script Is Running

>> The Meaning of IFS in Bash Scripting

>> Check if a String Contains a Substring in Linux

>> Running Script or Command as Another User in Linux

>> Running Multi-Line Shell Code at Once From Single Prompt

>> Guide to Generate Random Numbers in Linux

>> Debugging a Bash Script

>> Get the Contents of a Web Page in a Shell Variable

>> How to Parse a CSV File in Bash

>> What is a .pid File?

>> How To Write a Bash Script That Answers Interactive Prompts

>> How To Script “Yes” When Installing Programs

>> The Uses of the Exec Command in Shell Script

>> Splitting a File at Given Line Numbers

>> How to Delete Multiple Files at Once in Bash

>> Difference Between grep, sed, and awk

>> Run a Function in a Script from the Command Line

>> Here Document and Here String

>> Running Multiple Commands in the Background

>> How to Use the Paste Command

>> Implement a Counter in Bash Script

>> Writing Text to File Using Linux Cat Command

>> Conditional Expressions in Shell Script

>> Save Modifications In-Place with awk

>> Repeat a Linux Command at a Given Interval

>> Appending Lines to a File

>> Defining a Bash Variable With or Without ‘export’

>> What Does a Double-Dash in Shell Commands Mean?

>> Command Substitution

>> Commands to Get the Min, Max, Median, and Mean of a Dataset

>> Execute Bash Script Directly From a URL

>> Send stdout to Multiple Commands

>> When to Use xargs

>> How to Evaluate Arithmetic Expressions in Bash

>> Linux comm Command

>> The Linux join Command

>> Using sed to Replace a Multi-Line String

>> Reading Output of a Command Into an Array in Bash

>> Bash Special Variables

>> Directory Navigation Using the pushd and popd Commands

>> How to Call an External Program Using awk

>> Read Random Line From a File in Linux

>> Linux source Command

>> Introduction to Bash Array

>> How to Reverse the Order of Lines in a File in Linux

>> String Manipulation in Bash

>> Linux ping Command

>> Introduction to the tee Command

>> Remove the First Characters of a Line

>> Linux man Command

>> How to Use the cd Command in Bash Scripts

>> How to Join Multiple Lines Into One

>> Linux Scripting Series

>> How to Change Terminal Output Color in Linux?

>> Is There a Way to ‘uniq’ by Column?

>> Using Shebang #! in Linux Scripts

>> Guide to the sed Stream Editor

>> “Cut” Command in Linux

>> date Command in Linux

>> Linux watch Command

>> The echo Command in Linux

>> Execute a Command in Multiple Directories on Linux

>> Working with the AWS CLI for EC2

>> Guide to the AWK Programming Language

>> Cron Job Testing and Debugging in Linux

>> Bash Functions in Linux

>> Guide to the Linux read Command

>> How to Use Command Line Arguments in a Bash Script

>> How to Pass Command Line Arguments to Bash Script

>> Pipes and Redirection in Linux

>> Guide to Stream Redirections in Linux

>> Creating Symbolic and Hard Links with Linux Commands

>> Linux Commands – Looping Through Directories

>> Linux Commands – Repeat a Command n Times

>> Silencing the Output of a Bash Command