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How to Add Windows and Linux host to Nagios Server for Monitoring
In the previous article, we demonstrated how to install Nagios Core on CentOS 8 / RHEL 8 server. In this guide, we will dive deeper and add Linux and Windows hosts to the Nagios Core server for...
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How to Schedule and Automate tasks in Linux using Cron Jobs
Sometimes, you may have tasks that need to be performed on a regular basis or at certain predefined intervals. Such tasks include backing up databases, updating the system, performing periodic reboots...
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How to Create Affinity and Anti-Affinity Policy in OpenStack
In the organizations where the OpenStack is used aggressively, so in such organizations application and database teams can come up with requirement that their application and database instances are...
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How to install and Configure Postfix Mail Server on CentOS 8
Postfix is a free and opensource MTA (Mail Transfer Agent) used for routing or delivering emails on a Linux system. In this guide, you will learn how to install and configure Postfix on CentOS 8. Lab...
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How to Install VirtualBox 6.0 on CentOS 8 / RHEL 8
VirtualBox is a free and open source virtualization tool which allows techies to run multiple virtual machines of different flavor at the same time. It is generally used at desktop level (Linux and...
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How to Install Ansible (Automation Tool) on CentOS 8/RHEL 8
Ansible is an awesome automation tool for Linux sysadmins. It is an open source configuration tool which allows sysadmins to manage hundreds of servers from one centralize node i.e Ansible Server....
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How to Manage Remote Windows Host using Ansible
Ansible is increasingly becoming the go-to platform for application deployment, and software provisioning among developers owing to its ease of use and flexibility. Furthermore, it is easy to set up...
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How to Install Docker CE on CentOS 8 / RHEL 8
Docker is a daemon-based container engine which allows us to deploy applications inside containers. With the release of RHEL 8 and CentOS 8, docker package has been removed from their default package...
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How to Create and Add EBS Volume in AWS Instance (EC2)
In this topic, we shed light on how you can add or attach an EBS (Elastic Block Storage) volume on an AWS instance. An extra EBS volume supplements storage space for your instance. Once attached to...
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How to Install Ansible AWX with Docker-Compose on CentOS 8
Red Hat has provided two GUI tools for centralized management of remote nodes using Ansible. Ansible Tower AWX Ansible Tower is a web-based interface and REST API endpoint for Ansible. It provides...
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Lock User Account After n Incorrect Login attempts in Linux
Linux Server hardening is one of the important task for sysadmins when it comes to production servers. It is recommended that one should enable login or ssh attempts policy, means user’s account should...
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How to Run Containers with Podman on CentOS 8 / RHEL 8
Podman is a free and open-source daemonless container platform that was built to develop, manage and deploy containers and pods on a Linux environment. Pods are group of containers which are usually...
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How to Install and Configure KVM on Debian 10 (Buster)
KVM stands for Kernel based Virtual Machine, KVM is a free and open source type 2 hypervisor which is installed on top of Linux like distributions. Once the KVM is installed on your system then it...
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How to Boot CentOS 8 / RHEL 8 Server in Single User Mode
For day to day operations tasks, sometimes Linux geeks have to boot Linux server in single user mode for recovering the root password, repairing file system errors, fixing incorrect entry of fstab and...
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How to Setup DNS Server (Bind) on CentOS 8 / RHEL8
Developed in the 80’s by students at Berkeley University, BIND (Berkeley Internet Name Domain) is an open source DNS server that provides DNS services on Linux distributions. So, what is a DNS server ?...
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How to Sync Time in Linux Server using Chrony
Time plays an important role in Linux servers specially when they are used in banking, stock markets and other financial sectors. If we want all our Linux servers should have the correct time, then we...
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How to Use When Conditionals Statement in Ansible Playbook
Oftentimes, Ansible plays contain various sets of variables. The tasks to be carried out using these variables vary according to the nature of these variables. And this is where Conditional statements...
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How to Add and Delete Static Route in Linux using IP Command
Part of the skill set for any Linux user, and particularly a systems administrator, is the ability to perform some network tweaks on a Linux system. This includes adding and deleting routes to enable...
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How to Extend EBS Boot Disk of EC2 Instance without Reboot
You can easily increase the size of your root volume of an AWS instance (EC2) without incurring any form of downtime or interrupted associated with a reboot. In this tutorial, we will give you a...
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How to Install and Configure Samba on CentOS 8
Windows and Linux systems are structured differently and often, a peaceful co-existence between the two is often a challenge. Thanks to Samba, the two systems can now share files and folders over the...
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