Linux KVM related tutorial/FAQ

How to reset forgotten root password for Linux KVM qcow2 image/vm

in Debian / Ubuntu, Linux, Linux KVM, Troubleshooting last updated February 10, 2018

I have Debian Linux VM running on KVM. I think I forgotten the password for the root account and I am no longer able to run ‘su -‘ command. How do I reset the password for the root account for KVM VM which is in qcow2 format?
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How to install KVM server on Debian Linux 9 Headless Server

in Debian / Ubuntu, Linux KVM, Virtualization last updated February 9, 2018

Kernel-based Virtual Machine (KVM) is a virtualization module for the Linux kernel that turns it into a hypervisor. How can I install KVM with bridged networking, setup guest operating system as the back-end virtualization technology for non-graphic Debain Linux 9.x server?
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How to add ssh key to qcow2 Linux cloud images using virt-sysprep

in CentOS, Debian / Ubuntu, Linux, Linux KVM, Virtualization last updated December 28, 2017

I have installed and setup KVM server on an Ubuntu Linux. I downloaded various .qcow2 cloud images. How do I setup public ssh keys for downloaded CentOS/FreeBSD/Ubuntu cloud images using virt-sysprep?
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How to use KVM cloud images on Ubuntu Linux

in Linux KVM, Ubuntu Linux last updated February 5, 2018

How do I download and use a cloud image with kvm running on an Ubuntu Linux server? How do I create create a virtual machine without the need of a complete installation on an Ubuntu Linux 16.04 LTS server? How can I use KVM cloud image on Ubuntu?

How to forcefully shutdown a guest VM using virsh command on Linux KVM

in CentOS, Debian / Ubuntu, Linux, Linux KVM, RedHat and Friends, Suse, Virtualization last updated February 26, 2017

I used the command ‘virsh shutdown vm1’ to shut down a guest named vm1 using the virsh command. However, it is still running, and my vm1 is not responding to an ssh session. Is there is a way to forcefully stop or kill a guest VM using the virsh command from host server?

How to enable KVM virsh console access for Ubuntu Linux VM

in Linux, Linux KVM, Ubuntu Linux last updated February 19, 2017

I just followed your tutorial and setup KVM with Ubuntu Linux as a new guest virtual machine. However, I am unable to use the command: ‘virsh console vm’. How do I setup and enable console access in order to gain shell access on the newly created Ubuntu Linux 16.04 LTS VM?

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