Deepak Prasad

Step by Step openstack installation Guide using packstack single node in centos or rhel 7 linux. Install Openstack on CentOS 7 using Packstack

Troubleshoot OpenStack ironic introspection for issues like Invalid provision state for introspection, Look up error: Could not find a node for attributes.

Here I have shared the steps to fix "ironic node-delete is associated with instance" where you fail to delete an ironic node accociated with an instance.

In this article I will show you the steps to create and set property of flavor with examples. Use openstack flavor set --property for existing flavors

Discover how to use SFTP with IPv6 addresses in Linux, from configuring the SSH server to listen on IPv6 interfaces to connecting securely with the appropriate syntax.

The SQL LEFT JOIN clause allows you to query data from multiple tables. It returns all rows from the left table and the matching rows from the right table.

Online graphic editors have become increasingly popular in recent years, particularly as more and more people turn to the internet for their creative needs.

Product Data Management (PDM) and Product Lifecycle Management (PLM) are two essential tools for managing product development and production. Both PDM and PLM

C++ provides several file I/O functions that enable programmers to write and read data from files. One of these functions is WriteFile, which is part of the

Step by step instructions on OSPF configuration using Cisco router and examples

To "archive the username" in Java means to store the username for later access and retrieval. This may mean storing the username in a variable, class field,

vncserver service failed because a configured resource limit was exceeded tigervnc on RHEL 7, remove temporary files from under /tmp and /tmp/.X11-unix/.

Steps to configure bridged network in virt-manager. Virtual Machine Manager provides a graphical tool for administering virtual machines for KVM, Xen etc

Learn to configure NIC teaming on CentOS/RHEL 7 Linux node. RHEL 7 implements network teaming with a small kernel driver and a user-space daemon, teamd.

Define ephemeral storage. Difference between root disk vs ephemeral disk in openstack? Ephemeral storage is non persistent storage unlike cinder swift storage.

To find or get complete dependencies list of rpm you can use rpm, yum and repoquery command for both installed and non installed package

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

Understand thearchitectecture of different kinds of cluster i.e. high performance, load balancing and high availability cluster in Red Hat Linux

Configure high availability cluster, create cluster resource and troubleshoot cluster resource for a cluster on Red Hat / CentOS 7 with examples.

Configure High Availability Cluster and configure cluster resource and add behind the cluster in CentOS and Red Hat 7 Linux using pcs resource create..

Understand resource group and constraints with examples in Cluster. Different types of constraint, adding existing resource to group, High Available Cluster

OpenStack command line cheat sheet for begineer. This CLI cheat sheet consists of Flavor, Identity, Compute Nova, Neutron Network, Block Storage, Guestfish

Tutorial guide to install systemtap (stap) to extract, filter and summarize data to enable diagnosis of complex performance. Systemtap Tutorial Linux

How to set default boot kernel in linux? Change the default boot entry for kernel ? Boot with old kernel version ? Revert to previous kernel version ?

How to install configure two node cluster in linux on centos rhel 7 using vmware virtualbox corosync-quorumtool two_node wait_for_all auto_tie_breaker

How to configure HA LVM on CentOS / RHEL 7 Linux without GFS2. How can I configure cluster service or resource to activate and monitor shared LVM volumes?

How to delete iscsi target? Remove inactive iscsi target? Remove iscsi storage target from initiator? Remove iscsi virtual disk on CentOS / RHEL 7 Linux.

nova compute architecture , what is the role of nova-api, nova-scheduler, nova- console, nova-conductor, nova-console-auth, nova-compute service in OpenStack

Restrict and prevent access to root user for files and directories in linux using extended attributes chattr. Root and all users will be restricted to modify

How to enable tty for more than 6 console. How to disable all the tty terminals in Linux. systemd disable tty. systemd enable tty using getty service in Linux.