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	== Basic Usage ==		== Basic Usage ==

Admin: Created page with "Category:Wiki == Basic Usage == === Connect to a Hypervisor === You can connect to a local or remote hypervisor with the following command: virsh connect qemu:///system This connects to the local system's hypervisor. For remote systems, replace `qemu:///system` with a URI of the remote host, such as `qemu+ssh://user@hostname/system`. === List Virtual Machines === To list all virtual machines on the system, including running, paused, and shut o..."

2025-12-16T16:31:44Z

Created page with "Category:Wiki == Basic Usage == === Connect to a Hypervisor === You can connect to a local or remote hypervisor with the following command: <nowiki> virsh connect qemu:///system</nowiki> This connects to the local system's hypervisor. For remote systems, replace `qemu:///system` with a URI of the remote host, such as `qemu+ssh://user@hostname/system`. === List Virtual Machines === To list all virtual machines on the system, including running, paused, and shut o..."

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[[Category:Wiki]]

== Basic Usage ==

=== Connect to a Hypervisor ===
You can connect to a local or remote hypervisor with the following command:

<nowiki>
virsh connect qemu:///system</nowiki>

This connects to the local system's hypervisor. For remote systems, replace `qemu:///system` with a URI of the remote host, such as `qemu+ssh://user@hostname/system`.

=== List Virtual Machines ===
To list all virtual machines on the system, including running, paused, and shut off VMs:

<nowiki>
virsh list --all</nowiki>

The command outputs the status of all VMs, showing their IDs, names, and states.

=== Start and Stop Virtual Machines ===
To start a VM:

<nowiki>
virsh start <vm_name></nowiki>

To stop a VM:

<nowiki>
virsh shutdown <vm_name></nowiki>

For an immediate shutdown (without graceful shutdown):

<nowiki>
virsh destroy <vm_name></nowiki>

=== Rebooting a Virtual Machine ===
To reboot a running virtual machine:

<nowiki>
virsh reboot <vm_name></nowiki>

=== Suspend and Resume Virtual Machines ===
To suspend a running VM:

<nowiki>
virsh suspend <vm_name></nowiki>

To resume a suspended VM:

<nowiki>
virsh resume <vm_name></nowiki>

=== Define a Virtual Machine from an XML File ===
A VM can be defined using an XML configuration file. To define a VM from an XML file:

<nowiki>
virsh define /path/to/vm-config.xml</nowiki>

This command registers the VM with libvirt without starting it.

== Virtual Machine Information ==

=== Get Detailed Information on a Virtual Machine ===
You can retrieve detailed information about a VM by using the `dominfo` command:

<nowiki>
virsh dominfo <vm_name></nowiki>

This will display information like CPU usage, memory, and network stats.

=== Check the State of a Virtual Machine ===
To get the current state of a specific VM:

<nowiki>
virsh domstate <vm_name></nowiki>

This will return the state of the virtual machine (e.g., running, shut off, paused).

== Virtual Networks ==

=== List Virtual Networks ===
To list all the available virtual networks:

<nowiki>
virsh net-list --all</nowiki>

This shows the status of virtual networks, whether active or inactive.

=== Start and Stop Virtual Networks ===
To start a virtual network:

<nowiki>
virsh net-start <network_name></nowiki>

To stop a virtual network:

<nowiki>
virsh net-destroy <network_name></nowiki>

=== Define Virtual Network ===
To define a virtual network from an XML configuration file:

<nowiki>
virsh net-define /path/to/network-config.xml</nowiki>

This command defines a virtual network, but it does not start it.

=== Autostart Virtual Networks ===
To enable a virtual network to start automatically with the hypervisor:

<nowiki>
virsh net-autostart <network_name></nowiki>

== Virtual Storage Pools ==

=== List Storage Pools ===
To list the defined storage pools:

<nowiki>
virsh pool-list --all</nowiki>

=== Start and Stop Storage Pools ===
To start a storage pool:

<nowiki>
virsh pool-start <pool_name></nowiki>

To stop a storage pool:

<nowiki>
virsh pool-destroy <pool_name></nowiki>

=== Define Storage Pool ===
To define a storage pool from an XML file:

<nowiki>
virsh pool-define /path/to/storage-pool.xml</nowiki>

=== Autostart Storage Pools ===
To enable a storage pool to automatically start with the hypervisor:

<nowiki>
virsh pool-autostart <pool_name></nowiki>

== Virtual Machine Snapshots ==

=== List Snapshots of a VM ===
To list all snapshots of a VM:

<nowiki>
virsh snapshot-list <vm_name></nowiki>

=== Create a Snapshot ===
To create a snapshot of a running VM:

<nowiki>
virsh snapshot-create-as <vm_name> <snapshot_name> --description "Snapshot description"</nowiki>

This command creates a snapshot with an optional description.

=== Revert to a Snapshot ===
To revert a VM to a specific snapshot:

<nowiki>
virsh snapshot-revert <vm_name> <snapshot_name></nowiki>

=== Delete a Snapshot ===
To delete a snapshot:

<nowiki>
virsh snapshot-delete <vm_name> <snapshot_name></nowiki>

== Disk and Storage Management ==

=== Attach a Disk to a Virtual Machine ===
To attach a disk to a running VM:

<nowiki>
virsh attach-disk <vm_name> /path/to/disk.img vda --type disk --mode shareable</nowiki>

=== Detach a Disk from a Virtual Machine ===
To detach a disk from a VM:

<nowiki>
virsh detach-disk <vm_name> vda</nowiki>

== Useful Links ==
* [https://libvirt.org/ Official libvirt website]
* [https://linux.die.net/man/1/virsh virsh man page]
* [https://www.redhat.com/en/topics/virtualization What is Virtualization?]

VIRSH - Documentation - Revision history

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