# VMs

## HOW-TO

To start (or create) a VM, go in the desired folder and run
```console
$ ./run.sh [OPTS]
```

You can pass `qemu` flags (see `QEMU(1)`) to `./run.sh` directly or you can
make theses flags permanent by editing `run.sh` (this VM only) or `lib.sh` (all
VMs).

### Headless

For a headless VM, just remove the `-vga` and `-audio` flags from `lib.sh`.<br>
To start the VM in the background: `./run.sh & disown`

### CPU/RAM limit

The CPU flag is not set by default, see `QEMU(1)` for default values.<br>
Default RAM flag: `-m "2G,maxmem=$((HOST_RAM - 2))G"`.
```
./run.sh -smp "${NB_CPUS},maxcpus=${MAX_CPUS}" \
         -m "${RAM}G,maxmem=${MAX_RAM}G"
```

### Port forwarding

To forward host port 2222 to guest port 22:
```
./run.sh -nic user,hostfwd=tcp::2222-:22
```

### USB passthrough

If you need USB passthrough, uncomment and fill in the corresponding line in
`run.sh`.
[You may need root privileges](https://wiki.archlinux.org/title/QEMU#Pass-through_host_USB_device).

## See also

<https://github.com/quickemu-project/quickemu>