VirtualBox under console (VBoxManage)

I need to have virtual machines in servers without GUI. In this case I must configure virtual machines only with VBoxManage utility.

In first step i make/install MV under GUI version of VirtualBox and after that copy on guest server.
After that we need to register virtual machine.

vboxmanage registervm /path-to/vbox file

and start
VBoxManage startvm "Test" --type headless

When we need to shutdown virtual machine:
VBoxManage controlvm "Test" acpipowerbutton
or
VBoxManage controlvm "Test" poweroff

To view some information about virtual machine:
vboxmanage showvminfo /opt/vm/Test/Test.vbox

When we need to modify number of CPU. Stop virtual machine and afler that:
VBoxManage modifyvm "Test" --cpuhotplug on
VBoxManage modifyvm "Test" --cpus 4

To modify memory:
VBoxManage modifyvm "Test" --memory 4096

To delete network interface:
VBoxManage modifyvm "fbsd" --nic1 none

To add bridged interface:
VBoxManage modifyvm fbsd --nic1 bridged --bridgeadapter1 em1

To modify IP address
only if you have vboxguestadditions installed
# VBoxManage guestproperty get "Test" "/VirtualBox/GuestInfo/Net/0/V4/IP"
No value set!
# VBoxManage guestproperty set "Test" "/VirtualBox/GuestInfo/Net/0/V4/IP" 192.168.101.215
# VBoxManage guestproperty get "Test" "/VirtualBox/GuestInfo/Net/0/V4/IP"
Value: 192.168.101.215
# VBoxManage guestproperty get "Test" "/VirtualBox/GuestInfo/Net/0/V4/Netmask"
No value set!
# VBoxManage guestproperty set "Test" "/VirtualBox/GuestInfo/Net/0/V4/Netmask" 255.255.255.0
# VBoxManage guestproperty get "Test" "/VirtualBox/GuestInfo/Net/0/V4/Netmask"
Value: 255.255.255.0
# VBoxManage guestproperty get "Test" "/VirtualBox/GuestInfo/Net/0/V4/Gateway"
No value set!8
# VBoxManage guestproperty set "Test" "/VirtualBox/GuestInfo/Net/0/V4/Gateway" 192.168.101.1


To add virtual machine in bridge with network interfcace:
VBoxManage controlvm "Test" nic1 bridged em1


When we have this error:
==================
Waiting for VM "Test" to power on...  VBoxManage: error: VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ConsoleWrap, interface IConsole
===================
 must enable Virtualisation Technology in BIOS.


To view all os types supported by VBoxManasge
VBoxManage list ostypes (guest)

A short example: VBoxManage modifyvm "vm" --ostype Linux24_64

If you have following error:
This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot – please use a kernel appropriate for your CPU

Just enable:
VBoxManage modifyvm "vm" --longmode on

To make a screenshot via console:
VBoxManage controlvm "vm" screenshotpng screen-shot-dev-006.png

Other posibile problems:

If you have:

# VBoxManage startvm "vm"
VBoxManage: error: Invalid frontend name: 'GUI/Qt'

can try

vboxmanage startvm vm --type headless

Waiting for VM "vm" to power on...

or if you have 

vboxmanage startvm vm --type headless

Waiting for VM "vm" to power on...

VBoxManage: error: Failed to open/create the internal network 'HostInterfaceNetworking-bce0' (VERR_SUPDRV_COMPONENT_NOT_FOUND).

VBoxManage: error: Failed to attach the network LUN (VERR_SUPDRV_COMPONENT_NOT_FOUND)

you can try:

load module vboxnetflt

In my case:

kldload vboxnetflt

root@# kldstat

Id Refs Address            Size     Name

 1   14 0xffffffff80200000 17bc680  kernel

 2    2 0xffffffff819bd000 7b9a8    vboxdrv.ko

 3    1 0xffffffff81c11000 29d86    vboxguest.ko

 4    1 0xffffffff81c3b000 358d     ums.ko

 5    1 0xffffffff81c3f000 2a02     vboxnetflt.ko

 6    2 0xffffffff81c42000 ba02     netgraph.ko

 7    1 0xffffffff81c4e000 4123     ng_ether.ko

root@# vboxmanage startvm vm --type headless

Waiting for VM "vm" to power on...

VM "vm" has been successfully started.

root@#

Mapping Ports

VBoxManage setextradata "vm" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssh/Protocol" TCP 
VBoxManage setextradata "vm" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssh/GuestPort" 22 
VBoxManage setextradata "vm" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssh/HostPort" 2222

If you install phpVirtualBox and have problems with login steps you can try to start virtualserver manually in verbose mode.

 vboxwebsrv -v

If you have error VBOX_E_INVALID_VM_STATE

you can try: VBoxManage startvm "vm" --type emergencystop
and start the virtual machine again.