How to Install Graylog 2.4 with Elasticsearch 5.x on CentOS 7

In this guide, I'll take you through How to Install Graylog 2.4 with Elasticsearch 5.x on CentOS 7. Graylog 2.4 has full support for Elasticsearch 5.x and any latest version of MongoDB. What's Graylog? Graylog is...

How To Reset Root And User Password In CentOS 7.x and RHEL 7.x

CentOS 7.0 and RHEL are common in most configuration settings.On CentOS, we previously talked about How to Set Static IP Address on CentOS 7,. If you forgot your RedHat or CentOs...

How to Integrate Openfire XMPP Chat Server with Asterisk PBX server

After successfully Installing Asterisk PBX server and Installing Openfire XMPP Chat server, it's time to integrate the two so that our Chat server can be used within the VOIP infrastructure build...

Openstack Liberty Lab Part Eight: Add VM images

In this part of the series we're going to work through complete process of Adding images used to soin virtual machines on Openstack Cloud platorm.I will show you how to use...

How To Create and Use Local CentOS 7 YUM Repository Easily

As a Linux System Admin, It's alwasy an obligation to install sofware packages on a server.However, it's not always compulsary to install packages from official CentOS repositories over the internet.A good...

How to Fix Openstack Nova error “NoValidHost: No valid host was found.There are not...

I was trying to Deploy Openstack for testing inside VirtualBox and i got an error "NoValidHost: No valid host was found.There are not enough hosts available." while trying to run an...

Installing OpenNebula Front-end on CentOS 7

In this guide, we're going to cover the steps of Installing OpenNebula Front-end on CentOS 7. OpenNebula is a simple but feature-rich and flexible solution that helps you build and manage enterprise clouds...
install letsencrypt on linux

Easiest way to install letsencrypt on Linux

Install Letsencrypt on Linux: Today i would like to show you the easiest and quickest way to install Letsencrypt on Linux. The process involve few steps and is really automated. The...
BtrFS filesystem in Linux

Understanding and Working With BtrFS Filesystem in Linux

This blog post is aimed at helping you get started with B-tree filesystem (BtrFS). Kernel-based filesystems in the Linux kernel tree are currently over 55 with each filesystem having its pros...
configure KVM networking

How to mount VM virtual disk on KVM hypervisor

I've been managing a number of Virtual Machines on Vanilla KVM hypervisor for a while now. Suppose you have a VM that you want to mount its virtual disk on the...