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2235 articles
Configure High Availability Cluster in CentOS 7 (Step by Step Guide)
Step by Step guide to configure high availability cluster in CentOS or Red Hat 7 using pacemaker and corosync, 3 node HA Cluster on Virtual Box or KVMs..
Understanding High Availability Cluster and Architecture
Understand thearchitectecture of different kinds of cluster i.e. high performance, load balancing and high availability cluster in Red Hat Linux
Bash script multiple arguments: all args, functions, another script, and `typeset -f` over SSH
Bash multiple arguments with positional parameters, bash pass all arguments via "$@", bash pass multiple arguments to a function, forwarding to another script, …
Bash remove from array: one element, first item, duplicates, and subtract another array
Bash patterns to remove an element from an array, drop the first item, dedupe (bash array remove duplicates), and subtract all values of one array from another …
How to configure HAProxy in Openstack (High Availability)
Step by Step Guide to configure HAProxy in openstack i.e.High Availability using pacemaker and corosync to configure load balancer cluser in CentOS 7
How to configure Openstack High Availability with corosync & pacemaker
Step by step guide to configure openstack high availability (HA) using pacemaker and corosync for openstack controller nodes with HAProxy and VIP.
How to exit full screen mode in qemu virt-manager ( RHEL / CentOS 7)
How to exit full screen mode in qemu virt-manager for kvm hosts or get out of fullscreen. This article is validated on RHEL / CentOS 7 Linux on vnc viewer.
How to protect GRUB2 from booting kernel without password in Linux
Learn to set password to protect grub2 from booting a kernel without password. in rhel 7.To set password and protect grub2 remove unrestricted in menuentry
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
Linux Boot Process Explained Step by Step in Detail
Get detailed description of Step by Step Guide of Linux boot process with flowchart diagram. This also is the most asked question in interviews in Linux.
How to Configure Tripleo Undercloud to deploy Overcloud in OpenStack
Step by Step guide to install tripleo (openstack on openstack) undercloud and deploy overcloud in Openstack using virtual machines on Red Hat (RHEL 7)
How to Install TripleO Undercloud (Openstack) on RHEL 7
Step by step guide to Install TripleO Undercloud and deploy Overcloud in Openstack with single compute and controller node on KVM (virt-manager) RHEL 7
How to get complete dependencies list of rpm ?
To find or get complete dependencies list of rpm you can use rpm, yum and repoquery command for both installed and non installed package
How to download rpm package and all dependencies (RHEL / CentOS 7)
Download rpm package and all dependencies in CentOS / RHEL 7 using yumdownloader or repotrack. You can also use repoquery with yumdownloader to download rpm
How to download entire repository from CentOS /RHEL 7/8 for offline use?
To download entire repository from CentOS / RHEL 7 you will need one time access to Internet. Next you can sync the online repository to your local system