Tuesday, February 25, 2020

How to Backup and Restore XFS filesystem in RHEL 8

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

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

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

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)

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)

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

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

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.


Migrate existing Iptables to Nftables in RHEL8/CentOS

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

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

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


Step by Step Installing CentOS Linux 8 with Screenshots

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.




Install FOG Imaging solution for Linux/Windows and Mac

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

How to install and register Linux clients with Spacewalk server 2.8

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...

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

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

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

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

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

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

Create a Logical volume using Ansible

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RunDeck IT automation tool step by step installation guide

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

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


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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How to fix Grub Rescue in CentOS and RHEL 7

A fix for boot issue (Grub rescue) will be carried out by sysadmins by following few steps. A brief guide on how to recover GRUB and UEFI based servers.

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

(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”

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

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


Install and configure Apache Tomcat 8.5 on RHEL & CentOS7

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

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

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Setup Apache Web Server on RHEL and CentOS7

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


Stratis to create layered storage in RedHat Enterprise Linux 8

(adsbygoogle = window.adsbygoogle || ).push({}); Introduction Stratis is a new local...

How to Install and configure Kubernetes (k8s) on Ubuntu 18.04 LTS

Kubernetes or k8s is trending Open Source container orchestration solution provides feature such as application deployment by automating, scaling etc.

Install and configure Ansible Automation IT Tool

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Creating swap space using a file in Linux

If we don’t have any additional disks, you can create a file somewhere on our filesystem, and use that file for swap space. The following...

Setup email notification for SUDO users access

Set up email notification for any users whenever they try to access Sudo privileges. By adding few configuration changes in Sudo entry we can...

Installing Monit in Ubuntu Servers

Monit is a utility for managing and monitoring, processes, files, directories and devices on a UNIX system. Monit conducts automatic maintenance and repair and...

Install Proftpd with TLS/SSL

PROFTPD use plain transfer mode. By implementing with TLS/SSL which help to secure our Proftpd with TLS/SSL by eliminating plain text transfer.

Install and configure Logwatch in Ubuntu-Server

To watch the logs and send alert periodically to admin by configuring logwatch. Install Logwatch using # sudo apt-get install logwatch Edit logwatch.conf file # /usr/share/logwatch/default.conf/logwatch.conf Change the following: #...

Setting up a Ruby gem server to use locally

(adsbygoogle = window.adsbygoogle || ).push({}); Introduction Installing gems for a Ruby...

resolvconf: Error: /etc/resolv.conf isn’t a symlink, not doing anything

If we get this error in Ubuntu while restarting network service. Here /etc/resolv.conf is a file move it to /run/resolvconf/resolv.conf.   # sudo mv /etc/resolv.conf /run/resolvconf/resolv.conf Then create...

Chroot Ubuntu or recovering from multi boot issue (windows Installation)

To recover from a windows installation first we need to boot from LiveCD of ubuntu if you installed with system 32-bit use 32bit Live...

Apache virtual host entry to forward non-SSL to SSL for Rails application

In the rails application, if we need to forward all non-SSL traffic to SSL traffic we can use below virtual host entry. By default, rewrite...

Enable setup command in minimal installed Redhat or Centos 6 Linux

In minimum install setup, the command will not be enabled because it installed with limited packages. When we try to run "setup" command if...


How to Backup and Restore XFS filesystem in RHEL 8

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

Create Windows Server Image for OpenStack

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.

Offline installation of cx_oracle for Python 3.x

Offline installation guide of cx_oracle for Python 2.7 and 3.x. To fulfil the requirement to connect databases which are of 11g,12c,18c and 19c.

How to fix Grub Rescue in CentOS and RHEL 7

A fix for boot issue (Grub rescue) will be carried out by sysadmins by following few steps. A brief guide on how to recover GRUB and UEFI based servers.
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