Author: Rahul

If you manage a network with more than a few devices, you need monitoring software to keep tabs on all of them. Nagios is a leading open-source monitoring solution that alerts you when something goes wrong and gives detailed information when something needs your attention. This article covers how to monitor remote Linux hosts with Nagios. If you don’t have much experience with network monitoring or systems administration, you may find some of the jargon in this article difficult to understand. But don’t worry—we’ll explain everything that you need to know about monitoring software, remote hosts, and Linux servers. By…

MariaDB Galera Cluster 10.0.12 Stable has been released and available for production use. MariaDB is a relational database management system (RDBMS). Generally we use single node of database server for small application but think about application which have thousands of users keep online at a time, In that situation we need a structure which will capable to handle this load and provides high availability. So we need to add multiple database servers interconnected with each other and keep synchronized, so in case any server goes down other servers can take place of them and provide services to users. This article…

While we are learning about RAID devices, Generally we used smaller disks to build a RAID array. In that time when any raid disk failed and we replaced it with a new disk. Then raid rebuilding takes a few minutes or seconds only. But think about if you are running a high storage capacity server or any backup drives which are having raid configured in size of multiple terabytes and you need to rebuild RAID or rebuilding started due to some issues. It takes a lot of time and we run keep running `cat /proc/mdstat` time to time for checking…

Firstly, make sure you have installed Nagios core service. Else use our previous articles for installation steps of Nagios core service on Redhat based systems or Debian based system. Now read this article to install NagiosQL3 web interface for Administration of Nagios server using web interface. If you have installed Nagios core service with some other type. Please be careful with directories and files path and configuration files. We have successfully configured and integrated NagiosQL with Nagios using below steps. But we can not sure that it will 100% work for you. You may get few errors during setup. Feel…

Warning – Ruby 1.9 is reached to end of life and no more maintained. Kindly use below tutorials to install latest version of ruby Current stable – Install Ruby Latest Stable Release Previous stable – Install Ruby Previous Stable Release Ruby programming language is becoming is more popular these days. Ruby language was created by Yukihiro “Matz” Matsumoto and first published in 1995. This article will help you to install Ruby language in CentOS, RedHat system using RVM. For this article I am using CentOS 6.5. RVM provides easy set of commands to install single or multiple versions of Ruby…

If you’re managing a busy email inbox, you know how overwhelming it can be to keep up with the constant flow of messages. One way to streamline your email management process is to set up a catch-all email account using Postfix. A catch-all email account is an email address that is set up to receive all emails that are sent to your domain, regardless of the recipient’s specified email address. This can be useful if you have multiple email addresses associated with your domain, but you don’t want to miss any important emails that may be sent to an address…

In the fast-paced world of web technology, performance is king. One critical aspect of ensuring a smooth, efficient user experience is managing server resources effectively. For websites running on Apache, one of the most popular web servers, this often involves limiting bandwidth and the number of connections. This article will guide you through the steps for optimizing web performance by controlling these parameters on both Red Hat Enterprise Linux (RHEL) and Debian-based systems. Understanding the Need Before diving into the technical details, it’s essential to understand why limiting bandwidth and connections is crucial. Bandwidth caps can prevent a single user…

Nagios is most powerful infrastructure monitoring tools. Our earlier articles describes nagios core service installation and configure nagiosql with nagios core server. In this articles we are going to configure windows hosts to be monitor by Nagios server. Similar to NRPE service on Linux, NSClinet++ is the service for windows hosts to monitor through check_nrpe from nagios server. “How to Install and Configure NSClient++ and Monitor Remote Windows Host” Step 1 – Install NSClient++ Download the latest version of NSClient from its official site and start installation as below. The software will be named NSCP-xxxxxx.msi. During the installation process, you…

In the virtual hosting environment, if you’re providing VPS services to your clients. Then you may also need to setup bandwidth limit for all interfaces in virtual machines. So that no one vms can use more bandwidth than limit set. In other situation to limit bandwidth is also helpful for preventing multiple attacks which consumes lots of bandwidth. In this tutorial we will help you How to Limit Bandwidth Rate on Network Interfaces of Citrix XenServer VM. Method 1. Limit Bandwidth using XenCenter This is known as QOS limit. To enable this open your XenCenter and connect to your XenServer.…

Apache OpenOffice 4.1.10 Released on May 06, 2021. This version has Improvements to graphics, charts, forms, text annotations and accessibility feature. The Apache OpenOffice 4.1.10 Release Notes provide an explanation of these changes. However, you should have the opportunity to migrate your old profile settings to the new profile area. This how-to guide will help you to Install Apache Openoffice 4.1.10 on Ubuntu, Debian, and Linux Mint operating systems. If you are running LibreOffice or an older version of Apache OpenOffice, We recommend removing that from the system. System Requirements Linux kernel 2.6 or higher, glibc2 version 2.5.2 or higher…