How to manage VMs with OpenStack command line tools

OpenStack is an industry-standard open-source cloud management platform. Using OpenStack, one can build public, private or hybrid clouds easily. Due to the purely open nature of the platform, major IT vendors including Red Hat, Rackspace, IBM and HP are betting on its future, actively contributing to OpenStack development. In OpenStack, there are two different interfaces […]
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How to use KVM from the command line on Debian or Ubuntu

There are different ways to manage virtual machines (VMs) running on KVM hypervisor. For example, virt-manager is a popular GUI-based front-end for VM management. However, if you would like to use KVM on a headless server, GUI-based solutions will not be ideal. That is when virsh comes in handy. virsh is a command-line tool for […]
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VMware Player vs. VirtualBox: performance comparison

If you are using a virtualization hypervisor, one of your main concerns will be its performance, or in another word, its virtualization overhead. How much overhead is introduced by the virtualization layer will determine the raw performance of guest virtual machines (VMs) running on a hypervisor. Continuing from the feature comparison between VMware Player and […]
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How to use local storage for CloudStack VMs

When CloudStack is deploying a VM (including guest VMs and system VMs), by default, the VM is set to use NFS-mounted primary storage as their root partition. The NFS-mounted primary storage is shared among all compute nodes located in the same CloudStack cluster. One of the reasons for using shared primary storage is VM migration. […]
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How to log in to system VMs in CloudStack

In CloudStack, there are two system VMs (Console Proxy VM and Secondary Storage VM) that are automatically created by CloudStack for each zone. Console Proxy VM (CPVM) provides console access to tenant’s guest VMs, while Secondary Storage VM (SSVM) downloads and maintains VM templates used by tenants. While setting up CloudStack, you may experience problems […]
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How to add an additional vif to VM in XenServer

Assume that you know the name-label of the VM. Create a network for the new interface to be attached to, and returns the network-uuid $ xe network-create name-label=”alice-network” Find out vm-uuid of the VM $ xe vm-list name-label=<vm’s name-label> Create eth1 interface for the VM, and gets the uuid of the new interface $ xe […]
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How to clone a VM in VMware Server 2.0

When you need to create multiple VMs with vanilla Linux installed, cloning an existing VM saves you time with installation and configuration of new VMs. If you are using VMware Workstation, VM cloning process is streamlined with a built-in Clone Virtual Machine Wizard. However, if you are using VMware Server, it does not have such […]
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