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Beginners Guide for Read Command in Linux
Beginners Guide for Read Command in Linux
The read command is a built-in Linux utility that allows shell script writers to take single line input from the keyboard or from the file descriptor and store it in a variable.
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November 28, 2025 at 2:32 AM
Beginners Guide for Read Command in Linux
How to Use Here Document (HereDoc) in Linux Shell Script
How to Use Here Document (HereDoc) in Linux Shell Script
In Bash and also for other implementations of the shell, like zsh and fish, you can use the HereDoc to redirect a multi-line or block of lines from the script as an input to interactive commands.
linuxtldr.com
November 27, 2025 at 3:31 AM
How to Use Here Document (HereDoc) in Linux Shell Script
Beginners Guide for Unset Command in Linux
Beginners Guide for Unset Command in Linux
The unset command is a built-in Linux command used for flushing the value of variables or functions during program execution.
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November 26, 2025 at 3:19 AM
Beginners Guide for Unset Command in Linux
Beginners Guide for Set Command in Linux
Beginners Guide for Set Command in Linux
The set command is a built-in Linux command that can display or modify the value of shell attributes and positional parameters inside the current shell environment.
linuxtldr.com
November 25, 2025 at 4:03 AM
Beginners Guide for Set Command in Linux
Beginners Guide for Export Command in Linux
Beginners Guide for Export Command in Linux
The export command is used to create environment variables or update variable values in the current shell session by newly forked child processes without starting a new shell session.
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November 24, 2025 at 3:17 AM
Beginners Guide for Export Command in Linux
Beginners Guide for PS Command in Linux
Beginners Guide for PS Command in Linux
The PS is a native command-line utility for UNIX-based systems that monitors the currently running processes in your system.
linuxtldr.com
November 22, 2025 at 2:33 AM
Beginners Guide for PS Command in Linux
How to Count String Occurrences in a Text File
How to Count String Occurrences in a Text File
In this article, you will learn to count the number of string occurrences in a text file using the grep, wc, and tr commands, including the VIM text editor.
linuxtldr.com
November 21, 2025 at 2:29 AM
How to Count String Occurrences in a Text File
Beginners Guide for WC Command in Linux
Beginners Guide for WC Command in Linux
The WC command is used to count various parameters from the specified file, like the number of lines, word counts, byte counts, character counts, and many more.
linuxtldr.com
November 20, 2025 at 2:14 AM
Beginners Guide for WC Command in Linux
How to Add a Directory to the $PATH Variable in Linux
How to Add a Directory to the $PATH Variable in Linux
To avoid jumping into the directory to execute your local program or script, you can add their paths to the $PATH variable to access them from anywhere.
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November 19, 2025 at 2:22 AM
How to Add a Directory to the $PATH Variable in Linux
Beginners Guide for Source Command in Linux
Beginners Guide for Source Command in Linux
The source is a built-in command-line tool that reads and executes the commands from the specified file as its argument in the current shell.
linuxtldr.com
November 18, 2025 at 2:36 AM
Beginners Guide for Source Command in Linux
How to Set and List Environment Variables in Linux
How to Set and List Environment Variables in Linux
The environment variables are a set of key-value pairs that define the current environment and can affect the behavior of the ongoing programs that are executed in the environment.
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November 17, 2025 at 2:38 AM
How to Set and List Environment Variables in Linux
35+ Advance Examples of the Find Command in Linux
35+ Advance Examples of the Find Command in Linux
The find command is an advanced tool for searching files or directories rigorously in your file system, taking a little longer time than its alternative tools like the locate command.
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November 15, 2025 at 1:36 AM
35+ Advance Examples of the Find Command in Linux
Beginners Guide for Which Command in Linux
Beginners Guide for Which Command in Linux
The which command locates the executable command or file location in the user’s environmental path. It will give you the complete path an executable command or file is pointing towards in your file system.
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November 14, 2025 at 3:33 AM
Beginners Guide for Which Command in Linux
Beginners Guide for Groups Command in Linux
Beginners Guide for Groups Command in Linux
The groups command is used to list all the groups to which the specified user belongs. This will make it easier for you to manage users and groups in your system.
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November 13, 2025 at 3:06 AM
Beginners Guide for Groups Command in Linux
Beginners Guide for PWD Command in Linux
Beginners Guide for PWD Command in Linux
The PWD (a.k.a. "present working directory") will print the path of the directory you are currently working in, starting from the root directory to the current directory.
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November 12, 2025 at 2:34 AM
Beginners Guide for PWD Command in Linux
Beginners Guide for Echo Command in Linux
Beginners Guide for Echo Command in Linux
The echo command takes the text or file as an argument and prints the output on the screen. It is mostly used in shell scripts to instruct the user or give any piece of information.
linuxtldr.com
November 11, 2025 at 2:36 AM
Beginners Guide for Echo Command in Linux
What is /dev/null in Linux?
What is /dev/null in Linux?
The “/dev/null” file is a special file that can be found in all Linux systems. They are also referred to as “null device files,” “void,” and sometimes “a black hole of Linux”.
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November 10, 2025 at 2:25 AM
What is /dev/null in Linux?
Understanding Stdin, Stdout, and Stderr Streams in Linux
Understanding Stdin, Stdout, and Stderr Streams in Linux
In Linux, stdin, stdout, and stderr streams are already part of your Linux system and attached to your terminal device to inspect the data.
linuxtldr.com
November 8, 2025 at 2:28 AM
Understanding Stdin, Stdout, and Stderr Streams in Linux
How to Display the List of All Users in Linux (Ultimate Guide)
How to Display the List of All Users in Linux (Ultimate Guide)
It is important for a Linux administrator to find out all the users in their current system so that they can adjust the rules and privileges for each one.
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November 7, 2025 at 3:20 AM
How to Display the List of All Users in Linux (Ultimate Guide)
What is Symbolic Links (or Symlinks) in the Linux
What is Symbolic Links (or Symlinks) in the Linux
Symbolic links, sometimes also referred to as "symlinks," are used to create file pointers pointing towards files and directories in the Linux system.
linuxtldr.com
November 6, 2025 at 2:36 AM
What is Symbolic Links (or Symlinks) in the Linux
How to Create Normal User in Linux
How to Create Normal User in Linux
In Linux, we have a root user created by the system administrator and normal users, which are also created by the system administrator.
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November 5, 2025 at 4:08 AM
How to Create Normal User in Linux
Beginners Guide for Grep Command in Linux
Beginners Guide for Grep Command in Linux
The grep command is used to perform regular expressions to find out strings and patterns from the file that match a regular expression.
linuxtldr.com
November 4, 2025 at 3:03 AM
Beginners Guide for Grep Command in Linux
How to Install Geany IDE on Linux (with Dark Theme)
How to Install Geany IDE on Linux (with Dark Theme)
Discover the lightweight yet powerful open-source Geany text editor alternative to Notepad++ on Linux with an installation guide and a few tips and tricks.
linuxtldr.com
November 3, 2025 at 3:45 AM
How to Install Geany IDE on Linux (with Dark Theme)
Difference between "dir" and "ls" Commands (with an Example)
Difference between "dir" and "ls" Commands (with an Example)
In the Linux world, two common commands, “ls” and “dir“, replicate each other so well that most Linux users think one of them is an alias or symbolic link to the other.
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November 1, 2025 at 3:15 AM
Difference between "dir" and "ls" Commands (with an Example)
Purpose of utmp, wtmp, and btmp files in Linux (with an Example)
Purpose of utmp, wtmp, and btmp files in Linux (with an Example)
In this article, you will learn what utmp, wtmp, and btmp log files are, their purpose, and how to read them using the built-in command tool in Linux.
linuxtldr.com
October 31, 2025 at 3:39 AM
Purpose of utmp, wtmp, and btmp files in Linux (with an Example)