Linux Administration

Ansible tasks for Sysadmins with 25 examples

Babin Lonston - Modified date: January 7, 2020 2

Ansible tasks are a set of actions, the number of tasks can be combined to form a playbook required for sysadmins in their daily routine operations.

Splunk forwarder installation using Ansible

Babin Lonston - Modified date: March 29, 2020 2

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Create a Logical volume using Ansible

Babin Lonston - Modified date: January 2, 2020 3

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RunDeck IT automation tool step by step installation guide

Babin Lonston - Modified date: September 19, 2019 0

RunDeck is an Open source server application to automate our daily IT tasks by replacing tools like Ansible, puppet, chef.

Ansible Playbook to create Users and Groups in Linux

Babin Lonston - Modified date: January 3, 2020 1

Step by step creating with a user adding ansible playbook, Automating user account creation in Linux using Ansible playbooks made easy with Ansible.

Containerization

Create a Rolling Update Kubernetes Deployment in 3 ways

Babin Lonston - Modified date: June 11, 2020 0

Kubernetes Deployment will help to bring up our Application online in a short span of time with the number of designated Replica sets.

How to Create a Kubernetes Pod

Babin Lonston - Modified date: May 24, 2020 0

Creating our first Kubernetes Pod on our new Kubernetes cluster in some available methods. Let's see how to generate a YAML file from the created Pod as well.

How to access Kubernetes Dashboard ( Web UI)

Babin Lonston - Modified date: June 15, 2020 1

To get a rich graphical view of Kubernetes cluster, we need to deploy a few pods, replica, service and much more, Which allow to access Kubernetes dashboard.

How to Install a Kubernetes on CentOS 7

Babin Lonston - Modified date: April 24, 2020 0

Kubernetes is a container orchestrator used to deploy container-based application upon the requirement for developers and system administrators.

Create Windows Server Image for OpenStack

Matthew Secaur - Modified date: February 28, 2020 0

Create a Cloud image for OpenStack environment for windows server in QCOW2 format. This solves the purposes of running windows instance in a cloud environment.

Security

Import RPM Signing GPG keys on CentOS 8

Babin Lonston - Modified date: May 8, 2020 0

GPG Keys or GNU Privacy Guard is used to making sure that we are getting the right package from a trusted repository.

Install Wazuh Open Source Security Analytics

Babin Lonston - Modified date: May 7, 2020 2

Install production-ready Wazuh OpenSource security analytics tool to monitor your critical production environment.

Migrate existing Iptables to Nftables in RHEL8/CentOS

Babin Lonston - Modified date: January 5, 2020 0

Iptables can be migrated to nftables without spending time on writing it. Red Hat 8 based operating system provides translate tool to migrate the rules.

How to start using SELinux or Security-Enhanced Linux

Babin Lonston - Modified date: November 1, 2019 0

SELinux is one of security layer in Linux which protect the directory, files, process and ports with its own labels by preventing unauthorised access.

Generate a CSR Certificate Signing Request in Linux

Babin Lonston - Modified date: January 8, 2020 0

Generating a Certificate Signing Request (CSR) for Secure Sockets Layer (SSL) Certificate required when we need to sign with a Certificate Authority (CA).

Troubleshooting

Import RPM Signing GPG keys on CentOS 8

Babin Lonston - Modified date: May 8, 2020 0

GPG Keys or GNU Privacy Guard is used to making sure that we are getting the right package from a trusted repository.

Install Wazuh Open Source Security Analytics

Babin Lonston - Modified date: May 7, 2020 2

Install production-ready Wazuh OpenSource security analytics tool to monitor your critical production environment.

Migrate existing Iptables to Nftables in RHEL8/CentOS

Babin Lonston - Modified date: January 5, 2020 0

Iptables can be migrated to nftables without spending time on writing it. Red Hat 8 based operating system provides translate tool to migrate the rules.

How to start using SELinux or Security-Enhanced Linux

Babin Lonston - Modified date: November 1, 2019 0

SELinux is one of security layer in Linux which protect the directory, files, process and ports with its own labels by preventing unauthorised access.

Generate a CSR Certificate Signing Request in Linux

Babin Lonston - Modified date: January 8, 2020 0

Generating a Certificate Signing Request (CSR) for Secure Sockets Layer (SSL) Certificate required when we need to sign with a Certificate Authority (CA).

Storage Server

Introduction to Software RAID and RAID Levels in Linux

Babin Lonston - Modified date: May 22, 2020 0

Physical RAID or Software RAID (Redundant array of independent disks are used for reliability, resilience and performance. The most important part is to save our precious data without losing it in a production platform.

Moving a Volume Group from one Server to another Server

Babin Lonston - Modified date: May 10, 2020 0

Moving a Volume group from one system to another system without missing any underlying logical volumes and file systems.

How to Create a Thinly Provisioned Logical Volume on CentOS/RHEL/7/8

Babin Lonston - Modified date: January 4, 2020 0

Thinly Provisioned Logical volume is one of the advanced feature available in Logical volume Management, We can provision storage more than what we have.

Migrating Logical Volumes in Logical Volume Management

Babin Lonston - Modified date: January 17, 2020 1

Migrating Logical Volume by moving the extents from a PV to another PV when a faulty disk or the size of the disk need to be larger than the current one.