In this article, I will take you through step by step guide to install and setup firewalld GUI on Rocky Linux 8. According to Official documentation, firewalld provides a dynamically managed firewall with support for network/firewall zones that define the trust level of network connections or interfaces. It has support for IPv4, IPv6 firewall settings, ... Read more
![How to Install Podman on Ubuntu 20.04 LTS [Step by Step] 14](https://www.cyberithub.com/wp-content/uploads/2022/01/inpods.jpg)
In this article, I will take you through the steps to install Podman on Ubuntu 20.04 LTS but before that let's try to understand more about this application. According to Official documentation, Podman or Pod Manager Tool is an open source daemonless container engine for developing, managing, and running OCI Containers on our Linux System. ... Read more
In this article, we will see how to deal with the error "unable to drain node" in case you are getting it while trying to drain out the Cluster node for maintenance. Maintenance is a periodic activity which every organization regularly perform to keep the Cluster healthy, secure and up to date. In the last ... Read more
In this article, I will take you through 30 nmcli command examples in Linux. nmcli is an open source command-line tool for controlling NetworkManager and reporting network status. It is extensively used by the Linux professionals to harness the power of Network Manager directly from the command line. nmcli is used to create, display, edit, ... Read more
RPM stands for Red Hat package manager which is a collection of files. These files can be any like, configuration files, binary files or documentation files etc. Using RPM we can package our scripts/files for easy installation and modification in our machine. In fact we can share our build scripts with others by packaging into ... Read more
![How to Backup and Restore Kubernetes ETCD database [Step by Step] 18](https://www.cyberithub.com/wp-content/uploads/2022/01/bacres.jpg)
In this article, I will take you through the steps to backup and restore Kubernetes ETCD database but before that let's try to understand what is etcd and why it is important to backup etcd database. According to official documentation, etcd is a strongly consistent, distributed key-value store that provides a reliable way to store ... Read more
In this article, we will understand how to take a Kubernetes Cluster node out for Maintenance. Performing node maintenance is a standard task which needs to be done periodically. Sometimes taking the node out from a Cluster and joining it back to the Cluster can become tricky and cumbersome. Fortunately it is very easy to ... Read more
Search engines scan millions of sites every day to determine which ones are most relevant to display as results to users. For example, you enter the phrase "How to create your own site?" into the search box. In response, the search engine provides you with a particular page with many different elements: from specific website ... Read more
In this article, I will take you through 7 Important Bash shell scripts that every Linux Administrators Should Know About. In a typical scenario, every Linux administrator runs certain set of repetitive commands as part of their day to day task. Sometimes running command manually can be boring and frustrating so to deal with this ... Read more
![How to Deploy Metrics Server on a Kubernetes Cluster [Step by Step] 23](https://www.cyberithub.com/wp-content/uploads/2021/12/deplom.jpg)
In this article I will take you through a step by step guide to deploy metrics server. According to Github, Metrics Server is a scalable, efficient source of container resource metrics for Kubernetes built-in autoscaling pipelines. Metrics Server collects resource metrics from Kubelets and exposes them in Kubernetes apiserver through Metrics API for use by ... Read more