Articles

 *Warning*: Cannot modify header information – headers already sent

*Warning*: Cannot modify header information – headers already sent If you get an error in your...

 -bash: redirection error: cannot duplicate fd: Invalid argument

bash: redirection error: cannot duplicate fd: Invalid argument Login error on console “-bash:...

 4213 users (the maximum) are already logged in

4213 users (the maximum) are already logged in The above error is most likely due to the...

 A little bit about Shell Scripting

A little bit about Shell Scripting In this tutorial, we are going to discuss a little bit about...

 About 404 errors and how to Troubleshoot it?

About 404 errors and how to Troubleshoot it? The 404 is an http status code. There are many...

 About Linux Access Control List ( ACL )

About Linux Access Control List ( ACL ) Standard Linux file permissions are satisfactory for...

 About Linux Access Control List ( ACL )

About Linux Access Control List ( ACL ) Standard Linux file permissions are satisfactory for...

 About Linux FSCK ( FILE SYSTEM CONSISTENCY CHECK )

About Linux FSCK ( FILE SYSTEM CONSISTENCY CHECK ) The FSCK is a system utility. It is a tool...

 About Locate Command

About Locate Command We typically use find command, when we need to search for some files....

 About Traceroute

About TracerouteThe traceroute is a necessary tool that every network admin should be familiar...

 About UUID

About UUID UUID stands for Universal Unique Identifier. It is a 128-bit number used for uniquely...

 About Xinetd

About Xinetd Xinetd stands for the extended Internet services daemon. It is an open source super...

 Adding WAP Support To Apache

Adding WAP Support To Apache WAP is the abbreviation of Wireless Application Protocol, is a...

 All Apache Tuning Parameters

All Apache Tuning ParametersThe default Apache settings that cPanel sets upon introduction are...

 All about Linux Process Scheduling And Multitasking

All about Linux Process Scheduling And Multitasking Modern computer systems range from low-end...

 Apache Error: Too Many Open Files – Could Not Open Transfer – Unable To Open Logs

Apache Error: Too Many Open Files – Could Not Open Transfer – Unable To Open Logs This error...

 Application Trust Levels and their Functions

Application Trust Levels and their Functions Website security is an important factor in...

 Application Trust Levels and their Functions

Application Trust Levels and their Functions Website security is an important factor in...

 Bash-It Framework to Control Your Scripts and Aliases

Bash-It Framework to Control Your Scripts and Aliases Bash-it is a community-driven Bash...

 Basic shell commands in Linux ( For Linux Beginners )

Basic shell commands in Linux ( For Linux Beginners ) A shell is a user interface that provides...

 Best Open Source IP Address Management Softwares

Best Open Source IP Address Management Softwares IP address management softwares are used at...

 Best Password Managers for Linux

Best Password Managers for Linux Password manager is a tool that helps to store your...

 CakePHP Installation and Features

CakePHP Installation and Features CakePHP is an open source web framework and is written in PHP....

 Can I install my own Chat Rooms?

Can I install my own Chat Rooms? Chat rooms tend to be large system hogs on in a shared server...

 Commands to check hard disk partitions and disk space on Linux

Commands to check hard disk partitions and disk space on Linux The following command’s output...

 Common Network Protocols and Their Ports

Common Network Protocols and Their Ports There are many protocols while establishing a...

 Common PHP Compilation Errors and Fix

Common PHP Compilation Errors and Fix In this tutorial, we are going to discuss some of the...

 Common website errors and how to fix them?

Common website errors and how to fix them? There can be many issues for a website. For a common...

 Commonly Used Apache Modules

 Configure The General Settings of PhpMotion

Configure The General Settings of PhpMotion With the phpMotion application, you will be able to...

 Configure and Install PostgreSQL on CentOS 7 and 8

Configure and Install PostgreSQL on CentOS 7 and 8 PostgreSQL is also known as Postgres, and it...

 Database Free Simple Cross-Platform CMS: CMSimple

Database Free Simple Cross-Platform CMS: CMSimple CMSimple is a content management system which...

 Different ways to Restart PHP-FPM

Different ways to Restart PHP-FPM We all are familiar with PHP-FPM (FastCGI Process Manager). It...

 DirectAdmin dead but subsys locked Error

DirectAdmin dead but subsys locked Error In this tutorial, we can check how to fix “DirectAdmin...

 Disable direct root login and create dedicated SSH user

Disable direct root login and create dedicated SSH user It is very important to secure your...

 Django Installation

Django Installation Django is an open source free web designing application framework which has...

 Easy steps to setup and install Moodle

Easy steps to setup and install Moodle Moodle (Modular Object-Oriented Dynamic Learning...

 Enable Leverage Browser Caching in Nginx

Enable Leverage Browser Caching in Nginx Browser caching plays a paramount role in cache...

 Everything about Linux MultiTail

Everything about Linux MultiTail MultiTail (Monitor Multiple Files Simultaneously in a single...

 Everything about Linux Semaphore

Everything about Linux Semaphore Semaphore in Linux plays an important role in a multiprocessing...

 Everything about User Datagram Protocol (UDP)

Everything about User Datagram Protocol (UDP) The User Datagram Protocol (UDP) is a transport...

 Familiarize with Pico Text Editor

Familiarize with Pico Text Editor Pico (Pine composer) is a text editor for Unix and Unix-based...

 Force Linux User to Change Password

Force Linux User to Change Password If we create a user account with the default password, we...

 Ganglia Monitoring System

Ganglia Monitoring System Ganglia is a scalable, distributed system monitor tool for...

 How To Download Files From Linux Command Line

How To Download Files From Linux Command Line In this tutorial we can learn how to download...

 How To Extract .tar.gz Files using Linux Command Line

How To Extract .tar.gz Files using Linux Command Line In this tutorial we can learn how to...

 How To Reboot Linux System Using Command Line

How To Reboot Linux System Using Command Line Refer the following video tutorial if you want to...

 How can I check all running services?

Type: pstree  

 How can I check all running services?

Type: pstree  

 How can I check disk space?

How can I check disk space? Type df -m Sample (in megabytes):root@pentagon [/]# df -mFilesystem...

 How can I edit a file in Linux?

How can I edit a file in Linux? Editing a file is normal as well as essential. We often have to...

 How can I start and stop apache?

How can I start and stop apache? The standard start/stop scripts are located in /etc/init.d or...

 How can I start and stop proftpd?

How can I start and stop proftpd? The standard start/stop scripts are located in /etc/init.d or...

 How to Analyse Disk I/O in Linux Through Command Line

How to Analyse Disk I/O in Linux Through Command Line Disk I/O comprises of input/output or...

 How to Compile Apache with mod_http2, mod_ssl

How to Compile Apache with mod_http2, mod_ssl HTTP/2 was released in 2015 and it is the second...

 How to Enable Automatic Updates on a Linux Server

How to Enable Automatic Updates on a Linux Server We recommend you to keep your server services...

 How to Enable Automatic Updates on a Linux Server

How to Enable Automatic Updates on a Linux Server We recommend you to keep your server services...

 How to Export and Import Postgresql Database

How to Export and Import Postgresql Database PostgreSQL is a powerful, open source...

 How to Find What is Using Most of the Disk Space in Linux

How to Find What is Using Most of the Disk Space in Linux In this tutorial, we can check how to...

 How to Fix SMTP Error (-1): Connection to Server Failed

How to Fix SMTP Error (-1): Connection to Server Failed When we tried to send an email from...

 How to I upgrade my server’s kernel?

How to I upgrade my server’s kernel? InterServer offers free kernel upgrades on our dedicated...

 How to Install AWS Command Line Interface (awscli)?

How to Install AWS Command Line Interface (awscli)? Amazon Web Services (AWS) offers a broad set...

 How to Install Apache 2.4 and how to enable FastCGI

How to install apache 2.4 and how to enable FastCGI? In this documentation, we can discuss about...

 How to Install DataLife Engine Manually in Linux?

How to Install DataLife Engine Manually in Linux? DataLife Engine is a CMS (Contents Management...

 How to Install Jenkins on CentOS and Ubuntu Server?

How to Install Jenkins on CentOS and Ubuntu Server? Jenkins is a free and open-source automation...

 How to Install PHP Composer on a Linux Server?

 How to Install PHPSuhosin on a Linux VPS

How to Install PHPSuhosin on a Linux VPS Suhosin (pronounced ‘su-ho-shin’) is an advanced...

 How to Install Redmine?

How to Install Redmine? The Redmine application is a flexible project management web application...

 How to Install WP-CLI On a Linux Server?

How to Install WP-CLI On a Linux Server? It is very important to keep your WordPress...

 How to Install Zend Optimizer in Linux?

How to Install Zend Optimizer in Linux? In this documentation, we can check how to install...

 How to Install and Enable mod_mono?

 How to Install and Setup Angular CLI

How to Install and Setup Angular CLIAngular is an open-source framework for your web...

 How to Install phpList Manually

How to Install phpList Manually PhpList is an open source software, which is used for managing...

 How to Monitor and Fix the Server Load

How to Monitor and Fix the Server Load What is Server Load? Website owners and users will be...

 How to Safely Delete Files and Directories Using Linux Command Line

How to Safely Delete Files and Directories Using Linux Command Line In this tutorial we can...

 How to Set Redirection Rules in NGINX Webserver?

How to Set Redirection Rules in NGINX Webserver? The rewrite rules are used to redirect one URL...

 How to Setup Nginx Load Balancing?

How to Setup Nginx Load Balancing? If you are using Nginx as your web server, you can setup load...

 How to Test Website response time in Linux Terminal?

How to Test Website response time in Linux Terminal?Website response time can have a greater...

 How to Use Nmap Command

How to Use Nmap Command Network Mapper is an open security tool used for network exploration,...

 How to check CPU details on Linux

How to check CPU details on LinuxI t is important to know the details about the processor and...

 How to create and manage Virtual Hosts in Nginx server

How to create and manage Virtual Hosts in Nginx server Nginx is one of the best web servers that...

 How to do URL Masking?

How to do URL Masking? URL masking mean that you would like to hide the actual path of the...

 How to install VNC on Linux ( GUI for your Linux VPS )

How to install VNC on Linux ( GUI for your Linux VPS ) VNC stands for Virtual network computing....

 How to install and scan using Maldet

How to install and scan using Maldet In this documentation, we can learn how to install maldet...

 How to kill All Zombie Processes Running on the Server?

 How to kill All Zombie Processes Running on the Server? A process in its terminated state is...

 How to make Nginx Server Listen on Multiple Ports

How to make Nginx Server Listen on Multiple Ports Nginx is one of the best web server software...

 How to setup SSH Two Factor Authentication?

How to setup SSH Two Factor Authentication? SSH hardening is a better way to prevent...

 How to tweak the server to speed up the website

How to tweak the server to speed up the website Are you experiencing slow site loading and...

 How to use Sed command in Linux to update files

How to use Sed command in Linux to update files As a system administrator, you often have to...

 How to use Tar Command in Linux with examples

How to use Tar Command in Linux with examples The tar command stands for tape achieve, which is...

 How to use Vi or Vim editor in Linux

How to use Vi or Vim editor in Linux Almost all UNIX system available screen-oriented text...

 How to zip and unzip in Linux with Examples

How to zip and unzip in Linux with Examples A Zip archive is a compressed file format that...

 Important Linux Log Files and Their Uses

Important Linux Log Files and Their Uses The log file is a file that records either events that...

 Important Postfix Configuration Settings

Important Postfix Configuration Settings In today’s corporate environment, email is a common...

 Importing .sql file in MySQL via command line and phpMyAdmin

Importing .sql file in MySQL via command line and phpMyAdmin Websites using databases have...

 Install Apache Tomcat on Ubuntu 18.04

Install Apache Tomcat on Ubuntu 18.04 The Apache Tomcat is a free, open-source Java-based web...

 Install Docker on Ubuntu 18.04

Install Docker on Ubuntu 18.04 Docker is a set of the platform as a service (PaaS) products that...

 Install LiveZilla on Linux

Install LiveZilla on Linux LiveZilla is a customer support software. LiveZilla provides Live...

 Install MariaDB in Linux Server

Install MariaDB in Linux Server In this tutorial, we can learn how to install MariaDB in a Linux...

 Install MariaDB in Linux Server

Install MariaDB in Linux Server In this tutorial, we can learn how to install MariaDB in a Linux...

 Install NetBeans IDE on Ubuntu 18.04

Install NetBeans IDE on Ubuntu 18.04 The NetBeans is an open-source integrated development...

 Install Oxwall on Linux Server

How to install Oxwall on a Linux Server Oxwall is a free and open source community software...

 Install Percona Server in Linux

Install Percona Server in Linux Percona Server is an enhanced version of the MySQL database...

 Install Python 3.6 version in Linux

Install Python 3.6 version in Linux In this tutorial we can check how to install Python 3.6...

 Install Rkhunter on Linux Server

Install Rkhunter on Linux Server Before we install Rkhunter, we have to discuss about “Rootkit”....

 Install Squid to Configure Proxy Server

Install Squid to Configure Proxy Server In this tutorial we can check steps to install squid to...

 Install Wine on Linux Distribution

Install Wine on Linux Distribution In this tutorial, we can check how to Install Wine on Linux...

 Install WordPress over SSH

Install WordPress over SSH Though WordPress installation is possible through web hosting control...

 Install and setup rssh and scponly

How to install and setup rssh and scponly? With use of OpenSSH, rssh is a restricted shell, scp...

 Installing CouchDB and it’s Features

Installing CouchDB and it’s Features CouchDB is an open source database software that completely...

 Installing LAMP Stack on Ubuntu / Debian

Installing LAMP Stack on Ubuntu / Debian A LAMP (Linux, Apache, MySQL, PHP) stack is a common,...

 Installing LAMP Stack on Ubuntu / Debian

Installing LAMP Stack on Ubuntu / Debian A LAMP (Linux, Apache, MySQL, PHP) stack is a common,...

 Installing PgBouncer and it’s Features

 Installing binary node.js on Linux

Installing binary node.js on Linux To install node.js, log into your vps or server through SSH....

 JIRA Installation on Linux

JIRA Installation on Linux In this tutorial, I am going to guide you to install Jira on your...

 KernelCare Installation and Features

KernelCare Installation and Features The kernel is the central part of an operating system which...

 Laravel Queue Tutorial with Supervisor Process Control

Laravel Queue Tutorial with Supervisor Process ControlLaravel Queues are very powerful to execute...

 Learn Linux File System Permissions

Learn Linux File System Permissions Security is important, no matter if it is a personal...

 Learn Linux File System Permissions

Learn Linux File System Permissions Security is important, no matter if it is a personal...

 Linux Architecture

Linux Architecture Linux is an open-source operating system based upon UNIX. It is an operating...

 Linux Binary Directories Explained

Linux Binary Directories Explained Binaries are files that contain compiled source code (or...

 Linux Cat Command Usage with Examples

Linux Cat Command Usage with Examples The cat command (short for “concatenate “) is one of the...

 Linux Commands to Check Mounted Files on the System

Linux Commands to Check Mounted Files on the System The common commands to check the mounted...

 Linux Cron Explained

 Linux File System and File Paths

Linux File System and File Paths For any person, who does not have well knowledge of Linux...

 Linux Kill Command

Linux Kill Command The kill command is an excellent command to terminate a process directly...

 Linux LVM Management

Linux LVM Management The LVM stands for logical volume management. LVM is an abstraction layer...

 Linux Mail Command Usage with Examples

Linux Mail Command Usage with Examples Have you imagined to send emails through command line...

 Linux Memcached Explained

Linux Memcached Explained Memcached is a memory caching system. To understand memcached, we need...

 Linux Network File System (NFS) Installation and Configuration

Linux Network File System (NFS) Installation and Configuration NFS, the Network File system, is...

 Linux Regular Expressions Fundamentals

Linux Regular Expressions Fundamentals Regular expressions is a pattern-matching language used...

 Linux Regular Expressions Fundamentals

Linux Regular Expressions Fundamentals Regular expressions is a pattern-matching language used...

 Linux Text-Based Web Browsers

Linux Text-Based Web Browsers We all are familiar with web browsers. Google Chrome and Mozilla...

 Linux Top Command Usage with Examples

Linux Top Command Usage with Examples One of the most basic command to monitor processes on...

 Linux grep command usage with examples

Linux grep command usage with examples The grep command which stands for “global regular...

 Linux grep command usage with examples

Linux grep command usage with examples The grep command which stands for “global regular...

 Linux lshw Command.

Linux lshw Command. In this tutorial, we will discuss on the lshw command which provides...

 Linux man command

Linux man command The man pages are interface to the on-line reference manuals and man command...

 Linux pinfo command usage with examples

Linux pinfo command usage with examples Pinfo is an info file viewer or a program for viewing...

 Linux ss Command

Linux ss Command In this tutorial, we will be discussing on how to use the ss command and we...

 Linux watch command

Linux watch command Watch command is one of the most useful commands which mainly helps to keep...

 Manage Log Rotation Using Logrotate in Linux

Manage Log Rotation Using Logrotate in Linux As we know a system will generate several logs, the...

 Managing Swap Space in Linux

Managing Swap Space in Linux A swap space is an area of a disk which can be used with the Linux...

 Managing temporary files with systemd-tmpfiles

Managing temporary files with systemd-tmpfiles In this tutorial we can check how to manage...

 MongoDB Installation, Configuration, and Advantages

MongoDB Installation, Configuration, and Advantages MongoDB is a No SQL database. It is an...

 OwnCloud: The Private Cloud-Installation Guide

OwnCloud: The Private Cloud-Installation Guide OwnCloud is a file sharing server like drop box....

 Processes in Linux – An Overview

Processes in Linux – An Overview Everybody that has experience with computers will be familiar...

 Setup ILIAS LMS on Ubuntu 18.04/16.04 with Nginx

ILIAS is an Open-Source Learning Management System. ILIAS LMS offers to develop and realizing...

 Solution For Running Out of Inodes

Solution For Running Out of Inodes The inode is a data structure in Unix-like file system and...

 Steps to Install Dropbear SSH Server

Steps to Install Dropbear SSH Server Dropbear is a small SSH server using in Linux...

 Steps to install FFmpeg with all modules

How to install FFmpeg with all modules? FFmpeg is a free software, handling multimedia data by...

 TCPDUMP Command

TCPDUMP Command The tcpdump command provides the feature to save the packets which are captured...

 Task Scheduling In Linux Command Line

Task Scheduling In Linux Command Line In this tutorial we can learn how to schedule tasks via...

 Task Scheduling In Linux Command Line

Task Scheduling In Linux Command Line In this tutorial we can learn how to schedule tasks via...

 The File System in Linux

What is a file system? A file system defines the data stored in a computer system. It is used to...

 Touch command in Linux

Touch command in Linux The touch command is used to create an empty file and also to change the...

 Unix Z Commands

Unix Z Commands In this tutorial we can discuss about some of the powerful Z commands in Linux...

 Using Putty to SSH to Server

Using Putty to SSH to Server Download PuTTY from this site...

 Using screen to attach and detach console sessions

Using screen to attach and detach console sessions If you run a program in SSH, and then close...

 What If SSH Root Login Disabled and “su” Getting Permission Denied Error

What If SSH Root Login Disabled and “su” Getting Permission Denied Error  Sometimes, we get the...

 What and how to use MYISAMCHECK and MYSQLCHECK

What and how to use MYISAMCHECK and MYSQLCHECK The default storage engine of the MySQL database...

 What and how to use UNIX Variables with examples

What and how to use UNIX Variables with examples When you run a program, variables act as a way...

 What are file permissions?

What are file permissions? Linux servers have different possible file permissions which can be...

 What is Brotli Compression? Why Brotli is better than Gzip?

What is Brotli Compression? Why Brotli is better than Gzip? Brotli is a type of compression...

 What is CGI Script?

What is CGI Script? CGI stands for Common Gateway Interface. CGI runs on a web server to enhance...

 What is DHCP?

What is DHCP? DHCP (Dynamic Host Configuration Protocol) is a standardized network protocol. It...

 What is Docker Container?

What is Docker Container? Docker is an open source project for developing, shipping, and running...

 What is Git? Basic Git Commands

What is Git? Basic Git Commands With each and every day, the applications we are developing on...

 What is GlusterFS?

What is GlusterFS? Gluster is a distributed scale out file system. It provides an additional...

 What is ImageMagick and the Components

What is ImageMagick and the Components ImageMagick is a product suite to make, alter, form, or...

 What is LILO (Linux Loader)?

What is LILO (Linux Loader)? LILO stands for Linux Loader that is used to load Linux into...

 What is Linux Samba? Installation and Configuration

What is Linux Samba? Installation and Configuration Many organizations need to provide network...

 What is Linux Virtual Server Project (LVS)?

What is Linux Virtual Server Project (LVS)? The Linux Virtual Server Venture (LVS) permits load...

 What is Network Bonding? Types of Network Bonding

What is Network Bonding? Types of Network Bonding Network bonding is a process of combing or...

 What is PERL And How to Install Perl in Linux

What is PERL And How to Install Perl in Linux PERL- Practical Extraction and Reporting Language...

 What is SCP Command in Linux and how to use it?

What is SCP Command in Linux and how to use it? As we all know, Linux is one of the most loved...

 What is Virtual Memory And Demand Paging?

What is Virtual Memory And Demand Paging? Virtual memory and demand paging are memory management...

 What is Xcache and how to install Xcache

What is Xcache and how to install Xcache How to install Xcache? Xcache is a php accelerator....

 What is iconv?

What is iconv The iconv is a standardized application programming interface (API). It is used to...

 XAMPP Installation in Linux and Windows

XAMPP Installation in Linux and Windows XAMPP Server is a free open source cross-platform web...

 tmpwatch Command in Linux

tmpwatch Command in Linux The use of “tmpwatch ” command in linux is to removes files which...