% podman-machine-set 1

## NAME
podman\-machine\-set - Set a virtual machine setting

## SYNOPSIS
**podman machine set** [*options*] [*name*]

## DESCRIPTION

Change a machine setting.

The default machine name is `podman-machine-default`. If a machine name is not specified as an argument,
then the settings will be applied to `podman-machine-default`.

Rootless only.

## OPTIONS

#### **--cpus**=*number*

Number of CPUs.
Only supported for QEMU machines.

#### **--disk-size**=*number*

Size of the disk for the guest VM in GB.
Can only be increased. Only supported for QEMU machines.

#### **--help**

Print usage statement.

#### **--memory**, **-m**=*number*

Memory (in MB).
Only supported for QEMU machines.

#### **--rootful**

Whether this machine prefers rootful (`true`) or rootless (`false`)
container execution. This option updates the current podman
remote connection default if it is currently pointing at the specified
machine name (or `podman-machine-default` if no name is specified).

Unlike [**podman system connection default**](podman-system-connection-default.1.md)
this option makes the API socket, if available, forward to the rootful/rootless
socket in the VM.

Note that changing this option means that all the existing containers/images/volumes, etc...
are no longer visible with the default connection/socket. This is because the root and rootless
users in the VM are completely separated and do not share any storage. The data however is not
lost and you can always change this option back or use the other connection to access it.

#### **--usb**=*bus=number,devnum=number* or *vendor=hexadecimal,product=hexadecimal* or *""*

Assign a USB device from the host to the VM.
Only supported for QEMU Machines.

The device needs to be present when the VM starts.
The device needs to have proper permissions in order to be assign to podman machine.

Use an empty string to remove all previously set USB devices.

Note that using bus and device number are simpler but the values can change every boot or when the
device is unplugged. Using vendor and product might lead to collision in the case of multiple
devices with the same vendor product value, the first available device is assigned.


[//]: # (BEGIN included file options/user-mode-networking.md)
#### **--user-mode-networking**

Indicates that this machine relays traffic from the guest through a user-space
process running on the host. In some VPN configurations the VPN may drop
traffic from alternate network interfaces, including VM network devices. By
enabling user-mode networking (a setting of `true`), VPNs observe all
podman machine traffic as coming from the host, bypassing the problem.

When the qemu backend is used (Linux, Mac), user-mode networking is
mandatory and the only allowed value is `true`. In contrast, The Windows/WSL
backend defaults to `false`, and follows the standard WSL network setup.
Changing this setting to `true` on Windows/WSL informs Podman to replace
the WSL networking setup on start of this machine instance with a user-mode
networking distribution. Since WSL shares the same kernel across
distributions, all other running distributions reuses this network.
Likewise, when the last machine instance with a `true` setting stops, the
original networking setup is restored.

[//]: # (END   included file options/user-mode-networking.md)

## EXAMPLES

To switch the default Podman machine from rootless to rootful:

```
$ podman machine set --rootful
```

or more explicitly set with value true.

```
$ podman machine set --rootful=true
```

Switch the default Podman machine from rootful to rootless.
```
$ podman machine set --rootful=false
```

Switch the specified Podman machine from rootless to rootful.
```
$ podman machine set --rootful myvm
```

## SEE ALSO
**[podman(1)](podman.1.md)**, **[podman-machine(1)](podman-machine.1.md)**

## HISTORY
February 2022, Originally compiled by Jason Greene <jason.greene@redhat.com>