Setting up Qemu in Debian Linux

Guide to Setting up QEMU in Debian Linux

Setup Qemu in Debian Linux

To check if virtualization is enabled on your Debian Linux system, you can use the following command:



egrep -c '(vmx|svm)' /proc/cpuinfo

If the output is greater than 0, it means that virtualization is enabled on your system. This command checks for the presence of the Intel VT-x or AMD-V extensions, which are required for running virtual machines with QEMU.

Install QEMU and Virtual Machine Manager


 bash
sudo apt install qemu-kvm qemu-system qemu-utils python3 python3-pip libvirt-clients libvirt-daemon-system bridge-utils virtinst libvirt-daemon virt-manager -y

Verify that Libvirtd service is started



sudo systemctl status libvirtd.service

Start Default Network for Networking

Using virsh, the command-line interface tool for managing virtual machines, you can also interact with networks. Here's how you can start the default network and make it auto-start after a system reboot:

Start the Default Network:


 bash
   sudo virsh net-start default

Enable auto-start:
To make the default network auto-start after a system reboot, use the net-autostart command followed by the network name:


 bash
   sudo virsh net-autostart default

These commands will start the default network and configure it to start automatically when the host system boots up.

Check status with:



sudo virsh net-list --all



 Name      State      Autostart   Persistent
----------------------------------------------
 default   active       yes          yes

Add the user to the `libvirt` group, which allows the user to access and manage virtual machines using `libvirt`:



sudo usermod -aG libvirt $USER
sudo usermod -aG libvirt-qemu $USER
sudo usermod -aG kvm $USER
sudo usermod -aG input $USER
sudo usermod -aG disk $USER