In this article, we will learn how to monitor running processes on Linux. The Linux OS offers several commands that can be used to monitor a running process, but for checking dynamic real-time processes, we can use a command called 'TOP. This tool enables System Administrators to determine how fully real-time processes are utilized by […]

In this article, we will learn how to use sed command in linux with 12 practical examples. The sed command is a powerful and useful tool in Unix / Linux for editing the content (files) line by line, including inserts, appends, changes, and deletes. Furthermore, it supports regular expressions, so it can match complex patterns. […]

The "cd" (change directory) command in Linux/Unix is pretty simple. It is one of the standard routine commands for every Linux user. It permits you to switch directories from one to another via Terminal. The cd command works based on the absolute path and relative path. Note: If you are a newbie or Windows user, […]

Managing and administering Linux Servers is a daunting task for all System Administrators. Needs essential hands-on experience in the command line/ CUI. However, many significant projects are coming up to handle Linux Administration tasks via the web console. It helps the new system admins, DevOps, and Developers to handle the system administration task easier. In […]

DNF stands for Dandified YUM, it is a completely updated version of YUM Package Manager. It was originally introduced on Fedora 18, and has now become the default package manager on Fedora 22, RHEL, and CentOS-8 to handle the RPM package management. DNF improves the deficiencies of YUM, including poor performance, high memory usage, and […]

A brief introduction about CentOS CentOS is a Community-based Enterprise Operating System, with a free support platform which uses the source code of Red Hat Enterprises Linux (RHEL) distribution. The advantage of using CentOS is that it is completely free to install on any 64-bit x86 system. Most of the Web Hosting companies are using […]

Sudo is the default utility on Unix-Linux systems, which is known as SuperUserDo. The Linux system forbids normal users from executing administrative commands. However, we can use this mechanism to allow regular users to run any application or command as a root user or to grant specific  commands to specific users. In order to run […]

YUM stands for Yellowdog Updater Modified, which is an RPM (RedHat Package Manager) based package management tool for Linux Systems. Yum was introduced in RHEL version 5.10 onward and its deprecated 'up2date' command. Yum, command helps all Users and System Administrators to search for information about packages and then install, update, and remove all rpm […]

SSH stands for Secure Socket Shell, one of the well-known service protocols used to execute an operation to the remote administration over the internet. It provides a very secure passage between the designated computers. Once the connection is established, SSH will then provide encrypted sessions for all public (unsecured) networks in a client-server architecture. It […]

In computing, a good Firewall system can prevent any unauthorized access to the network security systems. Businesses and organizations invest a good amount of money in their cybersecurity infrastructure, depending on how crucial their business is. In this article, we will see the fundamentals of a new firewall service introduced in CentOS 7 named FirewallD. […]

SSH is one of the main key services in Linux/Unix based systems. SSH represents Secure Socket Shell. SSH protocol is used to access the remote server/system with an encrypted method of login using the default TCP/IP port 22 or a custom based port number. This service is mainly used by System and Network Administrators to […]

This article will help you to understand the 'useradd' command in Linux/Unix based systems. As we all are aware that Linux is a multi-user and a multitasking operating system (OS). It has been built with a large number of commands from basic to advance. Here, we are going to see the 'useradd' command, it is […]

This article will help you learn how to setup/configure a High-Availability (HA) cluster on Linux/Unix based systems. Cluster is nothing but a group of computers (called nodes/members) to work together to execute a task. Basically there are four types of clusters available, which are Storage Cluster, High-availability Cluster, Load-balancing Cluster, and HIGH-Performance Computing Cluster. In […]

This article will help you learn how to setup/configure iSCSI on Linux/Unix based systems. iSCSI stands for (Internet Small Computer System Interface), which is an Industry standard protocol which is mainly used to share the storage device over the TCP/IP layer. Unlike Samba or NFS, which work at the file system level whereas iSCSI works […]