20 Linux Virtualization Interview Questions and Answers

Q:1 What is Virtualization ? Ans: Virtualization is a technique for creating virtual resources (rather than the actual) such as server, storage device, network  and Operating system. Virtualization is dis-associating the tight bond between software and hardware. Q:2 What are the different types of  Virtualization ? Ans: Virtualization can be used in different ways  and  […]

Linux Interview Question and Answer

Q1)What is the difference between chmod and chown. Chmod change  the file/directory permission The Chown to change the ownership of a file or directory and ownership away to someone else. Q2)How to check the default run level. Cat /etc/inittab or who –r Q3)What is the ID for Logical volume management? LVM Id: 8e Q4)What is […]

OpenStack Interview Questions

Question1 – difference between cloud and virtualizationVirtualization is technology that separates functions from hardware, while clouds rely on that split. … Assuming intranet access, internet access, or both is already established, virtualization is what creates clouds. Software called a hypervisor sits on top of physical hardware and abstracts the machine’s resources. Question2- different cloud vendors […]

Install Oracle Database 12c on RHEL/CentOS 7

Contents Document Overview:-. 2 Prerequisites: 2 Preparing for Oracle 12c Installation. 2 To begin, make sure that all the packages currently installed on your RHEL/CentOS 7system are updated to their latest versions. 2 Next, installed all the required dependencies for the RDBMS, along with the zip and unzip packages. 2 Create the user account and groups for […]

Install and Configure Kubernetes on Ubuntu

Install and Configure Kubernetes on Ubuntu

~ How to install and configure Kubernetes Ubuntu 18.10, here I am using google instance ~ Below are the details of instances Node Name Master Node Node1 Node2 Node3 Hostname K8master K8node1 K8nod2 K8nod3 IP Address ~ There is one master node and other three nodes will at as slave and […]

Install Memcached with Apache on Centos 6/7

Install Memcached with Apache on Centos 6/7

Memcached is a general-purpose distributed memory caching system. It is often used to speed up dynamic database-driven websites by caching data and objects in RAM to reduce the number of times an external data source must be read. Memcached is free and open-source software, licensed under the Revised BSD license yum install memcached Configure memcache […]

Openstack Kilo installation Guide Ubuntu_14.04

Openstack Kilo installation Guide Ubuntu_14.04

Hi Folks, OpenStack is a cloud OS that controls large pools of compute, storage, and networking resources throughout a DC, all managed through a dashboard that gives administrators control while empowering their users to provision resources through a web interface. OpenStack Kilo, the 11th release of the open source software for building public, private, and […]


Upgrade OpenSSL from 0.9.x to OpenSSL 1.0.2 – ubuntu

apt-get remove –purge openssl libssl-dev wget –no-check-certificate tar -xvzf openssl-1.0.2f.tar.gz mv openssl-1.0.2f openssl cd openssl/ nano openssl.ld OPENSSL_1.0.0 { global: *; local: *; }; OPENSSL_1.0.1 { } OPENSSL_1.0.0; OPENSSL_1.0.1d { } OPENSSL_1.0.1; OPENSSL_1.0.2 { } OPENSSL_1.0.1d; ./configure -fPIC shared -Wl,–version-script=/root/openssl/openssl.ld -Wl,-Bsymbolic-functions make make install Check your new version openssl version -a and add PATH to […]

moduled.dep no such file or directory

FATAL: Could not load /lib/modules/2.6.32-358.18.1.el6.x86_64/modules/moduled.dep: no such file or directory I had trouble while installing RHEL 6 on my virtual machine. After installation of RHEL 6 I got error Could not load/lib/modules/2.6.32-358.18.1.el6.x86_64/modules/moduled.dep: no such file or directory. Fix : 1. Go to the rescue mode. 2. Run following command: #chroot /mnt/sysimage 3. run following command […]