Solved 'No valid host was found. not enough hosts available'
Fix Overcloud "No valid host was found. There are not enough hosts available" on Undercloud OpenStack with Red Hat — baremetal, IPMI, compute services, and flavor property mismatches.
Step-by-Step: Upgrade multiple HPE VC firmware with SUM
Step by step guide to upgrade multiple HPE VC firmware (Virtual Connect) using Smart Update Manager. Perform parallel upgrade of the VC using SUM.
Tutorial: What is GlusterFS shared storage and types of volumes
What is GlusterFS Tutorial Replication Types of Volumes. Distributed Volume Replicated Volume. RHEL CentOS 8 glusterfs shared storage. gluster file system linux
How to set GRUB2 password using grub2-setpassword (RHEL / CentOS 7)
Steps to set grub2 password using grub2-setpassword for unautorized modification of grub2 entries. Also steps to remove grub2 password from rhel /centos 7
How to change IO scheduler permanently in Linux
Steps to change IO scheduler permanently in Linux using tuned profile and grub2 kernel or you can change IO scheduler using /sys/block/sdX/queue/scheduler
/etc/network/interfaces missing in Ubuntu
If you are using Ubuntu, you must have encountered the "/etc/network/interfaces missing" error. Because Ubuntu 18.04 and above uses netplan to configure your
Linux find File using the command-line [8 Different Ways]
In this tutorial we have covered 8 different methods to find file in Linux using filename, file extension, file type, file size, file's modification date, file permission, file ownership etc
Install MongoDB on Rocky Linux 8.4 (Step-by-Step)
In this tutorial we will cover the steps to install MongoDB on Rocky Linux.
3 easy steps to configure gmail smtp relay with postfix
Step by step tutorial to configure postfix using third party gmail smtp relay to send mails to external network. Use SASL with Google 2-Step Authentication
Install & configure FreeIPA Server & Client (RHEL/CentOS 7)
Step by Step guide tutorial on how to install and configure FreeIPA, ipa server LDAP, kerberos, DNS and IPA client on RHEL/CentOS 7 Linux with GUI and CLI
What is fencing | Setup KVM cluster fencing RHEL CentOS 8
Step-by-Step Tutorial to configure cluster fencing, stonith device in RHEL and CentOS 8 Linux. Use fence_xvm to fence KVM HA Cluster nodes. Setup pacemaker fencing.
Install Oh My Zsh on Linux [Step-by-Step]
Step by Step instructions to install Oh My Zsh on different Linux distributions such as Ubuntu, Red Hat, CentOS, Debian, OpenSuSE, Arch Linux
Using Node.js with Visual Studio Code
Knowing how to use Node.js with Visual Studio Code is easy. All you do is install your preferred Node.js version and Visual Studio Code for your operating
How to use Node.js with Eclipse IDE [Step-by-Step]
Step by Step instructions to setup and use node.js with Eclipse IDE with examples to write your first code.
Convert CentOS 8 to Rocky Linux 8
As you know, CentOS Linux 8 became the end of life on 31 Dec 2021. It will now continue its life as CentOS Stream 8. Many people/organizations using CentOS
How to use Node.js with Atom IDE [Step-by-Step]
Step by step instructions to use node.js with Atom IDE. Create and run your first JS using Atom IDE.
How to use Node.js with Sublime Text IDE
Step by Step instructions to use node.js with sublime text IDE. Install Node.Js and Sublime Text IDE for the Integration.
Weather Data Made Easy: Mastering API Integration for Developers
Weather information is vital in our daily lives, from planning outdoor activities to making informed decisions in sectors like agriculture, transportation,
Install ELK stack on Rocky Linux 8
Step by step instructions to install ELK Stack on Rocky Linux. Install Elasticsearch, Logstash and Kibana
How to Enable Wake-on-LAN in Ubuntu 22.04? [SOLVED]
In this article we will tell you how to enable Wake-on-LAN in Ubuntu and example usage.
Create KVM virtual machine | virt-manager | RHEL CentOS 8
Step-by-Step Guide to create KVM Virtual Machine using Virtual Manager in RHEL and CentOS 8 Linux. Create VM, Take Snapshot, Assign Networks using Virtual manager GUI
Install MongoDB on AlmaLinux 8 [Step-by-Step]
Step by Step instructions to install mongodb on AlmaLinux 8. Access mongodb shell, create admin user, establish a connection with mongodb server using a different client. configure firewall and selinux
Could not resolve host: mirrors.rockylinux.org
3 possible solutions to Could not resolve host: mirrors.rockylinux.org and Failed to connect to mirrors.rockylinux.org port 443: Connection timed out
Install Rancher on Rocky Linux 9 [Step-by-Step]
Step by step instructions to install rancher on Rocky Linux 9 with screenshots.
3 simple and useful tools to grep multiple strings in Linux
How to grep multiple strings and patterns in single line from a file in Linux or Unix? Is it possible to grep multiple strings using single command from a file?
Remove Directory in Linux PROPERLY & SAFELY
In this tutorial I have shared the commands and examples to remove directory in Linux properly without loosing any data. Delete directories and sub directories using single command with and without regex
SOLVED: Get script directory path in Node.js
Node.js get script directory, node.js get current directory, node.js get absolute path, node.js get absolute directory path
How to setup Laravel in Docker? [2 Methods]
It would help to know Laravel, Docker, and Linux basics.- In this article, we will explore how to setup Laravel in Docker using two different methods:
HackerRank Solution: Python Capitalize!
In this tutorial we will cover following solutions for hacker rank problem capitalize in python Solution-1: Using for loop, Solution-2: Using a user- defined function, Solution-3: Using .join() method, Solution-4: Using …
Install R on Rocky Linux 8 & 9
Step by Step instructions to install R Programming Language in Rocky Linux. Download and Install specific version of R language

