Enable SNMP on VMware ESXi host

Simple Network Management Protocol (SNMP) allows management programs to monitor VMware and control networked devices in VMware ESXi. SNMP configuration for ESXi requires vSphere Command-Line Interface. vCenter Server and ESXi systems include different SNMP agents. vCenter Server SNMP agent. The SNMP agent included with vCenter Server can send traps when the vCenter Server system is […]
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Build Applications with Docker Compose Examples

Docker Compose is an orchestration tool for Docker that allows you to define a set of containers and their interdependencies in the form of a YAML file. You can then use Docker Compose to bring up part or the whole of your application stack, as well as track application output, etc. Build applications with docker […]
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Docker commands with example

Use these Docker commands with an example for your reference. Container – Docker Containers are what docker is built on. They encapsulate an application and all of its libraries and dependencies, so it can be run anywhere Docker is installed. Image – A Docker Image is a file that is essentially a snapshot of a […]
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Enable VNC Console Access in VMware ESXi

The ability to connect to a virtual machine using a VNC client has been available since the early days of VMware GSX but is not officially supported by VMware. Use the following steps to enable VNC console Access in VMware ESXi host. SSH to the ESXi host chmod 644 /etc/vmware/firewall/service.xml chmod +t /etc/vmware/firewall/service.xml vi /etc/vmware/firewall/service.xml […]
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OpenVPN Server Installation and Configuration in Linux

OpenVPN is one of the most popular and widely used VPN software solutions. Its popularity is due to its strong features, ease of use and extensive support. OpenVPN is Open Source software which means that everyone can freely use it and modify it as needed. In this article, we can setup OpenVPN Server Installation and Configuration […]
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Set up an iSCSI Target and Initiator and configure multipath

We used two CentOS 7 VMs to configure the Set up an iSCSI Target and Initiator and configure multipath settings. network-vm1 Network1 : 10.1.1.11 Network2 : 10.1.2.20 network-vm2 Network1 : 10.1.1.12 Network2 : 10.1.2.21 iSCSI Target Creation An iSCSI target can be a dedicated physical device in a network, or it can be an iSCSI software-configured […]
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Detect New Hard Disk Without Reboot VMware

A new hard disk to your Linux OS running on any Virtual Environment which like VMware workstation. It won’t reflect unless you reboot the Guest OS. In order to detect the new hard drive without reboot use the following steps. Add a New Disk To VM First, you need to add hard disk by visiting […]
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Change root password on kvm qcow2 image

How to change root password on kvm qcow2 image guestfish is an interactive shell that you can use from the command line or from shell scripts to access guest virtual machine file systems. All of the functionality of the libguestfs API is available from the shell. We will use the guestfish tool to modify the […]
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internal DNS resolution with neutron network

The Networking service enables users to control the name assigned to ports by the internal DNS. We will check to enable internal DNS resolution with neutron network on openstack cloud. The internal DNS functionality offered by the Networking service and its interaction with the Compute service. Integration of the Compute service and the Networking service […]
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Install docker swarm and configure cluster

Docker Swarm is a native clustering for Docker. The best part is that it exposes standard Docker API meaning that any tool that you used to communicate with Docker (Docker CLI, Docker Compose, Dokku, Krane, and so on) can work equally well with Docker Swarm. That in itself is both an advantage and a disadvantage […]
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