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.
In this article, we will look into the possible reasons of getting network.service failed to start LSB: Bring up/down networking error in RHEL/CentOS 7/8 based systems and the number of solutions that can be done to solve this issue. This error is quite common now a days for all the Linux Professionals to deal with. ... Read more
In this article I will take you through 11 Useful LVM(lvcreate, pvcreate and vgcreate) command example on Linux. You might be aware of LVM Technologies which is frequently being used by multiple Organizations to manage their resources effectively. You can check more about LVM Configuration on How to Configure LVM in Linux (pvcreate, vgcreate and ... Read more
In this article I will take you through 11 Useful PSSH Command Examples to Perform Parallel SSH in Multiple Linux Servers. You might be familiar with ssh tool which we often use to run some command or perform certain task on remote host. pssh(parallel-ssh) tool is the more advanced version of ssh command which comes ... Read more
In this article, I will take you through 15 Popular pssh command examples in Linux to perform parallel ssh in a single command. PSSH is a very popular command line tool used for parallel SSH Connections in Linux. You can connect multiple servers with different Linux/Unix OS to perform parallel SSH Operations. In many occasions ... Read more
In this article, I will take you through the steps to install and setup Freeradius Server in Linux (RHEL/CentOS 7/8). The FreeRadius server project is the implementation of the Remote Authentication Dial-In User Service (RADIUS) protocol used by many corporations and Internet service providers to authenticate users connecting from remote locations. The FreeRadius server daemon, ... Read more
In this example, I will take you through the steps to resize qcow2 image with virt-resize using 6 Easy Steps. If you are running multiple virtual machines using qcow2 image and let's suppose one day you might feel you need some extra storage in your virtual machine then you need to go for resizing. This ... Read more
In this article, I will take you through the steps to install kvm server tools(virsh) on Linux (RedHat/CentOS 7/8) in 6 Easy Steps. Many of you might be familiar with Virtualization concepts where one can create mutliple virtual machines on a host machine by converting host machine into Hypervisor. You can use certain KVM tools ... Read more
In this article, I will take you through 15 Useful examples of iperf commands in Linux. iperf is an open source tool that can be easily installed in Linux. It provides a reliable information about Network Bandwidth and its performance. You can easily check the network latency and other errors using this tool. You can ... Read more
In this article I will take you through 18 Useful virsh commands examples for KVM Hypervisor Management. virsh is a free tool available to manage multiple domains deployed with Linux/Other OS in a bare metal with basic hardware resources like cpu, memory etc. It can also be used in ESXi, Virtualbox, QEMU etc to deploy ... Read more
In this article, we will go through 20 Useful Linux/Unix ssh-keygen command examples. ssh-keygen command is one of the most used Open source command in Linux Based Systems to generate Public/Private Key pair which can be used for authentication, passwordless login and in many more use cases. You will see this tool available by default ... Read more