This category contains all the Linux, Solaris and ELK based topics.
In this article, I will explain you about the possible reasons for "Failed to restart network service: Unit network service not found" error and will also show you all the possible solutions that can be done to solve this issue. As you might be aware this error is very frequent whenever you change some network ... Read more
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 article, I will take you through the steps to delete Elasticsearch Unassigned Shards. Elasticsearch stores data in the form of documents, which are grouped into an index. In the case of a huge amount of data, the number of documents in a single index may cross the limit of the underlying hardware capacity. ... Read more
In this article, I will show you how to delete all Elasticsearch Red Status Indices in 3 Easy Steps. Many times it so happens that your Elasticsearch will go down due to some reasons or it might not start properly if you perform reboot operation. In those cases you will see your cluster status as ... 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