Linux is an Open source operating system comes in many flavors like RedHat, Ubuntu, CentOS , OpenSUSE etc. It is currently supported in almost all the infrastructure and is most widely used OS around the World. I will cover all the important Linux Topics under this category.
Last night I was working on my systems then suddenly saw a lot of Nagios Alerts on Dashboard showing “Socket Timeout” error. Then I went to my Server from where I was getting the nagios alerts and then tried to check the nrpe service status. It seems nrpe was not running then I started troubleshooting … Read more
In this article we will look into all the possible scenarios which can cause “nrpe.service: main process exited, code=exited, status=2/INVALIDARGUMENT” error and the solution to fix this error. You might have seen this error in a Server where you have installed nrpe client package. Basically Nagios connects the Servers through nrpe client package to gather … Read more
In this article, i will take you through the best steps to install perl on Ubuntu 20.04. Perl (Practical Extraction and Reporting Language) is a very popular and powerful language for String Handling and String Processing. You will see the usage of Perl as web scripting language along with other web technologies and frameworks. It … Read more
In this article, I will take you through 17 traceroute command examples to Identify Network Problems in Linux/Unix. traceroute command is a network diagnostic tool used in Linux based Systems to check and identify the network connectivity problems from source to destination. By default it will send the 60 byte packets for max 30 hops … Read more
In this article, I will take you through best steps to Install Perl on RHEL/CentOS 8. Perl (Practical Extraction and Reporting Language) is a very popular and powerful language for String Handling and String Processing. You will see the usage of Perl as web scripting language along with other web technologies and frameworks. It is … Read more
In this article, I will take you through step by step guide to install Jenkins on Ubuntu 20.04. Jenkins is an open source automation server used by the Developers/Testers around the world to build, deploy, exec and test the applications. It is frequently used as Continuous Deployment and Continuous Integration tool along with other DevOps … Read more
In this article, I will explain how to install traceroute command on RHEL/CentOS 7/8 Using 5 Easy Steps. traceroute command is a network diagnostic tool used in Linux based Systems to check and identify the network connectivity problems from source to destination. By default it will send the 60 byte packets for max 30 hops … Read more
In this article, I will explain in detail how to install let’s encrypt(Certbox) on RHEL/CentOS Using 10 Easy Steps. To enable HTTPS on your website, you need to get a certificate (a type of file) from a Certificate Authority (CA). Let’s Encrypt is a CA. In order to get a certificate for your website’s domain … Read more
In this article, I will take you through 6 Easy Steps to Install dig and nslookup command on RHEL / CentOS 8. Sometimes you might have noticed the error “dig command not found” when you are trying to use dig command in your Server. This is because dig tool will be available by default in … Read more
In this article, I will take you through 8 Easy Ways to Check Ubuntu Version in Bash Command Line. It is a very common practice for Ubuntu users to check the current Ubuntu version for many reasons. If anyone needs to install any new packages then the first thing we need to check is the … Read more