最後更新: 2024-09-27

目錄

• CLI Usage
• NIC Link Status
• USB Port & Device

 

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QEMU Monitor

 

Help

https://qemu-project.gitlab.io/qemu/system/monitor.html

QEMU Monitor Listening on X

-monitor dev    # stdio in non graphical mode

e.g. 使用 telnet 作 dev

-monitor telnet:localhost:24001,server,nowait

nowait    # 必須加上

QEMU should not block waiting for a client to connect

連接

telnet localhost 24001

Escape character is '^]'.
QEMU 5.2.0 monitor - type 'help' for more information
(qemu)

Ctrl-Alt-n

• 1   Target system display
• 2   Monitor
• 3   Serial port

Ctrl-a c
           Switch between console and monitor

 

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CLI Usage

• info X
• quit                 # Quit the emulator !!

info

(qemu) info status

VM status: running

(qemu) info block

drive-ide0-0-0 (#block139): /mnt/raid/VMs/ros/ros.qcow2 (qcow2)
    Attached to:      ide0-0-0
    Cache mode:       writeback

drive-ide0-1-0 (#block320): /mnt/raid/iso/systemrescuecd/systemrescue-9.03-amd64.iso (raw, read-only)
    Attached to:      ide0-1-0
    Removable device: not locked, tray closed
    Cache mode:       writeback

(qemu) info vnc

default:
  Server: 192.168.33.1:5919 (ipv4)
    Auth: none (Sub: none)

(qemu) info network

virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:88:88:01
 \ __org.qemu.nic0: index=0,type=tap,ifname=ros-wan,script=no,downscript=/etc/qemu-ifdown
virtio-net-pci.1: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:88:88:02
 \ __org.qemu.nic1: index=0,type=tap,ifname=ros-lan,script=no,downscript=/etc/qemu-ifdown

Stop, Resume, Reset, Wakeup

• stop                         # Pasue
• c|cont                      # Resume
• system_powerdown  # send system power down event
• system_reset
• system_wakeup       # wakeup guest from suspend

Snapshot

• savevm [tag]

If no tag is provided, a new snapshot is created.

• info snapshots

List of snapshots present on all disks:
ID        TAG               VM SIZE                DATE     VM CLOCK     ICOUNT
--        vm-20240927101016 55.9 MiB 2024-09-27 10:10:16 00:24:18.516

• loadvm tag

e.g. loadvm vm-20240927101016

• delvm tag                     # delete a VM snapshot from its tag

...

• commit device|all          # commit changes to the disk images
  (if -snapshot is used)

ISO

• eject [-f] device                # eject a removable medium (use -f to force it)

e.g. eject drive-ide0-1-0

• change device setting        # Change the configuration of a device.

e.g. change drive-ide0-1-0 /path/to/some.iso

Notes

可以用 "info block" 查看有什麼 device

boot_set bootdevice

define new values for the boot device list

sendkey

e.g. 'sendkey ctrl-alt-f1'

NIC Link Status

set_link name on|off -- change the link status of a network adapter

e.g.

set_link virtio-net-pci.0 off

 

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USB Port & Device

 

Guest 有什麼 Devices

info usb

# 沒 USB 時

USB support not enabled

OR

  Device 0.1, Port 6, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.0, Port 1, Speed 1.5 Mb/s, Product USB Host Device

Host 有什麼 Devices

info usbhost

  Bus 1, Addr 2, Port 1, Speed 480 Mb/s
    Hub: USB device 8087:0024
  Bus 2, Addr 2, Port 1, Speed 480 Mb/s
    Hub: USB device 8087:0024
  Auto filters:
    Bus *, Addr *, Port *, ID 0471:485d

usb_add device

# add USB device

e.g.

# Format: 'host:bus.addr' or 'host:vendor_id:product_id'

usb_add host:2.8

usb_del device

remove USB device 'bus.addr'