Linux SysadminsHow To Nix Guide For SysAdmins

34.4 C

Dubai

Sunday, July 5, 2020

Babin Lonston

How to Install a Kubernetes on CentOS 7

Babin Lonston - April 24, 2020 0

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

Database Servers

How to install MariaDB in CentOS/RHEL 8 and Fedora

Babin Lonston - April 11, 2020 0

A simple guide about how to install MariaDB on Red Hat-based Linux distributions, In a few steps, We are good with spinning up an OpenSource DB server.

Troubleshooting

Recover from Starting Switch Root or corrupted Glibc

Babin Lonston - April 1, 2020 0

While starting the server it will not move forward after "Starting Switch Root". Step by Step let's see how to fix this issue.

Troubleshooting

Recover from chmod 777 permission on a root filesystem

Babin Lonston - March 31, 2020 0

How to Recover from accidentally running chmod -R 777 / on any RPM-based Linux Operating systems.

Linux Administration

Linux Sudo to run Privileged Commands

Babin Lonston - March 29, 2020 0

Allow normal users to run any privileged commands by escalating to Sudo, by configuring Linux Sudo on any Linux os normal users are allowed to get root access.

System Management

Register a Linux client with Foreman

Babin Lonston - June 5, 2020 4

How to subscribe a client with our content management server foreman/Katello/Satellite.

System Management

Install Foreman Katello Patch Management on CentOS 7

Babin Lonston - May 18, 2020 12

Foreman with katello patch management is a Content Management System provides a lot of features such as provisioning, Inventory, Patch management and much more.

Security

Install Wazuh Open Source Security Analytics

Babin Lonston - May 7, 2020 2

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

Identity Server

Setup a FreeIPA or IDM Replica

Babin Lonston - March 1, 2020 0

IDM replica is the same copy of the existing master IDM server. The use of a replica is to have multiple copies of master and it can be used in different geographical location.

Linux Administration

How to Backup and Restore XFS filesystem in RHEL 8

Babin Lonston - January 31, 2020 0

To backup and restore an XFS filesystem it's possible by installing xfsdump package which provides xfsdump and xfsrestore commands.

123...16 Page 2 of 16

About Me

http://www.linuxsysadmins.com

Overall 14+ Years of experience in the IT field, currently working as a Senior Linux administration with Virtualization & Cloud. Being numismatist for a long time.

158 POSTS

2 COMMENTS

Latest News

Cloud & ContainerizationBabin Lonston - Modified date: June 11, 20200

Create a Rolling Update Kubernetes Deployment in 3 ways

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

Cloud & Containerization

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.

Monitoring Tools

Install and Configure Collectd Monitoring on Linux

Babin Lonston - Modified date: May 24, 2020 0

Start Monitoring your production environment using collectd to collects the system and application performance metrics.

Storage Servers

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.

System Management

Provisioning Bare Metal and VM from Foreman in 6 easy steps

Babin Lonston - Modified date: May 18, 2020 0

By Provisioning Bare metal and virtual machines, We can automate the process of installing an Operating system with the help of Foreman.

automation

Automation

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.

Automation

Splunk forwarder installation using Ansible

Babin Lonston - Modified date: March 29, 2020 2

(adsbygoogle = window.adsbygoogle || ).push({}); Splunk forwarder installation can be accomplished using Ansible. In...

Automation

Create a Logical volume using Ansible

Babin Lonston - Modified date: January 2, 2020 3

(adsbygoogle = window.adsbygoogle || ).push({}); In our last guide, we have seen how to...

Automation

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.

Automation

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

Cloud & 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.

Cloud & Containerization

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.

Cloud & Containerization

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.

Cloud & Containerization

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.

Cloud & Containerization

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.

Security

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.

Security

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.

Security

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.

Security

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

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.

Security

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.

Security

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.

Security

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.

Security

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

Storage Servers

Introduction to Software RAID and RAID Levels in Linux

Babin Lonston - Modified date: May 22, 2020 0

Storage Servers

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.

Storage Servers

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.

Storage Servers

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.

Storage Servers