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Abhishek Prakash

Abhishek Prakash

460 posts published

Creator of Linux Handbook and It's FOSS. An ardent Linux user who has new-found love for self-hosting, homelabs and local AI.

Fail2ban setup guide
Guides

Secure Your Linux Server With Fail2Ban [Beginner's Guide]

This detailed guide teaches you what is Fail2Ban, how to configure it and how to use it for providing an additional layer of security on your Linux system.

· Abhishek Prakash

Fixing 'sudo: unable to resolve host' Error in Linux
Troubleshooting

Fixing 'sudo: unable to resolve host' Error in Linux

This quick tutorial will show you how to fix 'sudo: unable to resolve host hostname' error in Ubuntu or any other Linux distribution.

· Abhishek Prakash

bash
Bash Tips

How to Compare Strings in Bash Shell Scripting

In this tutorial you'll learn how to compare strings in bash shell scripts.You'll also learn to check if a string is empty or null.

· Abhishek Prakash

How to Update Kali Linux With One Single Command
Tips

How to Update Kali Linux With One Single Command

Learn to update a Kali Linux system in one single command. Yes, it's that easy and straight forward.

· Abhishek Prakash

Change the shell in Linux
Tips

How to Change Shell in Linux

This quick tutorial shows how to check the running shell, available shell in the system and how to change the default shell in Linux.

· Abhishek Prakash

How to Check Linux Login History
Tips

How to Check Linux Login History

You may want to know who logged on your system and from where. You should also see bad login attempts on your system. Learn how to see login history in Linux.

· Abhishek Prakash

5 Examples of Cal Command in Linux
Commands

5 Examples of Cal Command in Linux

This quick tutorial shows you how to display calendar in Linux with cal command and some common examples of this command.

· Abhishek Prakash

View files in Linux
Tips

5 Commands to View the Content of a File in Linux Command Line

Here are five commands that let you view the content of a file in Linux terminal.

· Abhishek Prakash

How to Fix Tab Completion Not Working in Ubuntu & Debian
Troubleshooting

How to Fix Tab Completion Not Working in Ubuntu & Debian

Tab completion not working for you in the terminal? Here's the easy way to fix it in Ubuntu/Debian based distributions.

· Abhishek Prakash

nicehash
Tutorial

Want to Use NiceHash Miner on Linux? Here's How to do That

NiceHash is not available on Linux officially but you can still use other applications to connect to NiceHash marketplace using its excavator. Here's how to do that.

· Abhishek Prakash

Convert tabs into spaces
File Manipulation Commands

expand Command Examples

This tutorial teaches you to convert the tabs into spaces in Linux command line from the programming perspective.

· Abhishek Prakash

lsof command in Linux
Commands

7 Examples of lsof command in Linux

This article teaches you how to list opened files by a user or a process by using the lsof command in Linux. 

· Abhishek Prakash

Ping command in Linux
Host Information Commands

ping Command Examples

Here are some of the most common usages of ping command in Linux along with their explanation.

· Abhishek Prakash

Using Linux Sleep Command in Bash Scripts
Commands

Using Linux Sleep Command in Bash Scripts

This tutorial shows you how to use sleep commands and its various options in bash scripts.

· Abhishek Prakash

Run Linux shell commands in Python
Python

Executing Shell Commands with Python

A sysadmin would need to execute shell commands in Python scripts. Learn how to execute shell commands in Python.

· Abhishek Prakash

tee Command Examples
File Manipulation Commands

tee Command Examples

If you want to display the output of a command and save it to a file simultaneously, tee command is what you need. Learn various ways of using tee command in Linux.

· Abhishek Prakash

How to Remove Files and Directories in Linux Command Line [Beginner's Tutorial]
Tips

How to Remove Files and Directories in Linux Command Line [Beginner's Tutorial]

Learn how to delete files and remove directories with rm command in Linux.

· Abhishek Prakash

Linux servers
Tips

How to Ping a Specific Port Number

This quick tutorial shows you various methods to ping a specific port of a remote server.

· Abhishek Prakash

5 Ways to Check CPU Info in Linux
System Info

5 Ways to Check CPU Info in Linux

Here are multiple ways you can get CPU information in Linux command line. You can get processor information like the number of real cores, logical cores, hyperthreading, CPU frequency etc.

· Abhishek Prakash

SSH
Tutorial

Installing and Configuring OpenSSH on Ubuntu and Debian-based Distributions

Here's how to enable SSH on Ubuntu and Debian based Linux distributions. Also learn how to properly configure the SSH daemon on a Linux server to allow remote logins.

· seeni

How to Extract or Unzip tar.xz File in Linux
Tips

How to Extract or Unzip tar.xz File in Linux

Learn how to unzip tar.xz file in Linux terminal. Also learn what are tar and xz files.

· Abhishek Prakash

Linux command line
Basic File Commands

mv Command Examples

mv command in Linux is used for moving and renaming files and directories. In this tutorial, you’ll learn some of the essential usages of the mv command.

· Abhishek Prakash

Check the Mail Queue in WordPress and Delete it
Troubleshooting

Check the Mail Queue in WordPress and Delete it

If your WordPress website is sending too many spam emails, check your server's mail queue and delete the pending emails from there. Here's how to do that.

· Abhishek Prakash

scp command
Network Connection Commands

scp Command Examples

Here are some practical and essential scp command example to show how to securely copy files between remote Linux systems.

· Abhishek Prakash

cp Command Examples
Basic File Commands

cp Command Examples

cp command in Linux is used for copying files and directories. In this tutorial, you'll learn some of the essential usages of the cp command.

· Abhishek Prakash

Shutdown Linux
Commands

Linux Shutdown Command: 5 Practical Examples

The shutdown command in Linux allows you to shut down, reboot or schedule a shutdown of your system. This article explains the most common and useful examples of the Linux shutdown command.

· Abhishek Prakash

cd command
Directory Operation Commands

cd Command Examples

Learn to use cd command to its full potential in Linux with these practical examples.

· Abhishek Prakash

How to Create a Sudo User on Ubuntu and Debian
Tips

How to Create a Sudo User on Ubuntu and Debian

This article shows you the steps to create a sudo user in Ubuntu and other Debian-based Linux distributions.

· Abhishek Prakash

Fix Permission denied (publickey) SSH Error in Linux
SSH Troubleshoot

Fix Permission denied (publickey) SSH Error in Linux

This quick tutorial shows you how to fix ssh error "sign_and_send_pubkey: signing failed: agent refused operation Permission denied (publickey)" on Linux.

· Abhishek Prakash

touch command in Linux
File Properties Commands

touch Command Examples

Learn to use touch command in Linux with these useful and practical examples.

· Abhishek Prakash