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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.

Striped Logical Volume in Logical volume management (LVM)

Storage Servers Babin Lonston - Modified date: January 1, 2020 1

How to create Striped Logical Volumes in Logical Volume Management to get good I/O performance by balancing the data written to disks.

Shrink a Volume Group in Logical Volume Management (LVM2)

Storage Servers Babin Lonston - Modified date: January 17, 2020 0

Shrink a Volume Group in logical volume management will be performed by sysadmins when the requirement in place to reduce the no of disks from a VG.

How to Extend and Reduce LVM Logical Volume in Linux

Storage Servers Babin Lonston - Modified date: January 1, 2020 4

How to extend and reduce LVM logical volume management in Linux Operating Systems.

How to Setup iSCSI Target and Initiator on RHEL 7.x / RHEL 8

Storage Servers Babin Lonston - Modified date: November 1, 2019 0

iSCSI Storage is a block-level storage solution shares the RAW disks over the network. iSCSI target will act as a server and iSCSI initiator will act as the client.

LINUX SECURITY

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).

LINUX OPERATING SYSTEMS

Linux Variant's

Step by Step Installing CentOS Linux 8 with Screenshots

Babin Lonston - Modified date: January 4, 2020 1

CentOS Linux 8 is completely free to use and licensed under GNU GPL, It provides all features available in RHEL 8 and support available from the community.

Step by step Oracle Linux 8 Installation guide with screenshots

Linux Variant's Babin Lonston - Modified date: January 4, 2020 0

Installing RedHat Enterprise Linux 8.0 with screenshots

Linux Variant's Babin Lonston - Modified date: January 8, 2020 0

Step by step Debian Linux 9 Installation guide with screenshots

Linux Variant's Babin Lonston - Modified date: September 19, 2019 0

Step by step Scientific Linux 7.5 Installation guide with screenshots

Linux Variant's Babin Lonston - Modified date: September 19, 2019 0

SYSTEM MANAGEMENT

System Management

Install FOG Imaging solution for Linux/Windows and Mac

Babin Lonston - Modified date: January 14, 2020 0

Fog or "Free Open-Source Ghost" is an open source piece of cake used for imaging solution licensed under GPL.

System Management

How to install and register Linux clients with Spacewalk server 2.8

Babin Lonston - Modified date: September 19, 2019 2

In earlier guides, the server-side setup has been completed. Currently, its time to set up with our client-side installation and configuration. Initially, we need...

System Management

How to create Software channels, Repositories, Activation keys and sync in Spacewalk Server 2.8

Babin Lonston - Modified date: September 19, 2019 2

In our previous article, we have covered with installing and configuring the spacewalk server, by following in this guide we are about to walk...

System Management

How to install Spacewalk Linux systems management on RHEL and CentOS Linux 7

Babin Lonston - Modified date: September 19, 2019 0

A spacewalk is an Open Source Linux System Management solution provided by RedHat under GPLv2 Licence with major features like Inventory and Provisioning.

Ansible tasks for Sysadmins with 25 examples

Automation 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

Automation Babin Lonston - Modified date: January 2, 2020 0

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

Create a Logical volume using Ansible

Automation Babin Lonston - Modified date: January 2, 2020 2

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

RunDeck IT automation tool step by step installation guide

Automation 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

Automation 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.

100 Linux Interview Questions for Beginners in 2019

Babin Lonston - Modified date: September 19, 20190

Linux Interview Q&A

Linux Interview questions and answers for Level 1 role. Those who are looking to be an entry-level Linux admin and preparing for an interview look into it.

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TROUBLESHOOTING

Troubleshooting

Your account are not allowed to access to crontab because of pam configuration.

Babin Lonston - Modified date: January 14, 2020 0

(adsbygoogle = window.adsbygoogle || ).push({}); In today guide a simple solution for above topic...

The solution for “touch: cannot touch `test.txt’: No space left on device”

Troubleshooting Babin Lonston - Modified date: September 19, 2019 0

In this guide, we are about to provide a simple solution for the titled issue "No space left on device". In case we receive "No...

1 stop solution for setfacl “Operation not supported” in Linux

Troubleshooting Babin Lonston - Modified date: January 4, 2020 0

Introduction Setfacl error: We may come across this issue in a production environment while creating with the new file...

How to clear Oracle x86 servers ILOM faulty message

Troubleshooting Babin Lonston - Modified date: September 19, 2019 0

Let us see how to clear the ILOM faulty messages. start the SP console using the command. # start SP/faultmgmt/shell List out all faulty messages. # fmadm faulty Repair the faulty...

WEB SERVERS

Web Server

Install and configure Apache Tomcat 8.5 on RHEL & CentOS7

Ahmad Wamiq - Modified date: January 7, 2020 0

Apache Tomcat is an open-source technology, which licensed under Apache License version 2. Basically to understand what the use of Tomcat it's a simple HTTP server used for Java Servlet, JavaServer Pages, Java Expression Language.

How to configure logging in Apache Web server

Web Server Babin Lonston - Modified date: January 7, 2020 0

In this guide let us see how to log any required particular logs in Apache web server. To read about Apache related topic click on...

Understanding Apache Web Server logs

Web Server Babin Lonston - Modified date: January 7, 2020 0

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

Setup Apache Web Server on RHEL and CentOS7

Web Server Babin Lonston - Modified date: January 7, 2020 0

(adsbygoogle = window.adsbygoogle || ).push({}); Introduction to Apache Web Server In...

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Virtualization

Migrating multi-writer VMware VM’s from Island cluster to vSAN cluster

Babin Lonston - Modified date: January 6, 2020 0

Migrating Multi-writer disks of VMware VM's from Island Cluster to vSAN cluster with and without the downtime of Production.

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.

Web Server

Install and configure Apache Tomcat 8.5 on RHEL & CentOS7

Ahmad Wamiq - Modified date: January 7, 2020 0

Database Servers

Install MongoDB Replication setup on CentOS 7 and RHEL 7

Ahmad Wamiq - Modified date: January 4, 2020

Database Servers

How to Install MongoDB 4.0.5 on CentOS and Red Hat7

Ahmad Wamiq - Modified date: January 4, 2020

Database Servers

Creating ASM disks using SAN disks through multipath in Oracle DB Servers

Babin Lonston - Modified date: September 19, 2019

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LATEST ARTICLES

Automation

Ansible tasks for Sysadmins with 25 examples

Babin Lonston - 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.

Mail Servers

Forcing the from address when Postfix relays over SMTP

Babin Lonston - September 19, 2019 0

Forcing the from address when Postfix relays over SMTP

Identity Server

Setup a Linux server as IDM client to authenticate with Active Directory

Babin Lonston - January 17, 2020 0

Setup a Red Hat Enterprise Linux or CentOS Linux server as IDM Client to Authenticate with Active Directory using cross-forest trust.

Identity Server

Integrating IDM with AD (Active directory) using indirect cross-forest trust

Babin Lonston - January 17, 2020 4

IDM with Active Directory using Indirect cross-forest trust will help to integrate both and act as an intermediator by providing a lot of features than AD.

Cloud & Containerization

Docker Cheat Sheet for Sysadmins

Babin Lonston - January 14, 2020 0

Docker cheat sheet for sysadmins and developers will help to have a quick peek in the case for any future reference. This contains most of all docker options.

Cloud & Containerization

How to Connect to Amazon EC2 Remotely Using SSH

Babin Lonston - September 19, 2019 1

Most of the new Amazon web service (AWS) users will be stuck with permission issue while launching an EC2 instance in AWS. This will help to fix it.

System Management

Install FOG Imaging solution for Linux/Windows and Mac

Babin Lonston - January 14, 2020 0

Fog or "Free Open-Source Ghost" is an open source piece of cake used for imaging solution licensed under GPL.

Security

How to start using SELinux or Security-Enhanced Linux

Babin Lonston - 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 - 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).

Linux Administration

How to Create Local Yum Repository on RHEL 8

Babin Lonston - January 4, 2020 0

Set up a local Yum repository on RedHat Enterprise Linux 8 and CentOS 8 using a DVD or ISO file, This helps us to get the packages offline and ready to install.

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