Virtual Box Cheat Sheet
Exit scaled view
[RIGHT CTR] + [C]
Send CRTL-ALT-F2
[CTRL RIGHT] + F2
VM Paths
- File -> Settings -> General -> Default path for VMs:
- Per VM:
- General -> Advanced -> Folder Snapshots:
- Mass storage -> Add, select or remove disk image
Disk images are also handled in File -> Manager for virtual media
Install guest additions in Ubuntu VM
-
sudo apt install build-essential dkms linux-headers-$(uname -r)
- Menu -> Devices -> Insert guest additions cd image
- Yes, download current version
- sudo /media/myusername/VBox_GAs_X.Y.ZZ/autorun.sh
Shared Folders
Add a shared folder for the desired virtual machine in VirtualBox admin.
Mounting in Ubuntu Automatic
- Create a shared folder (example) "foo" using the guest menu and select "automount, permanent"
- Restart the virtual machine
- The shared folder is mounted in /media/sf_foo
- Add your user to the vboxsf group to gain access:
- sudo adduser charly vboxsf
Mounting in Ubuntu Manual
Create a shared folder (example) "foo" using the guest menu.
In the guest OS:
- sudo mkdir /media/foo
- sudo mount -t vboxsf foo /media/foo
/etc/fstab
- foo /media/foo vboxsf defaults,noatime 0 0
Mounting in Windows
- Connect network drive
- \\vboxsvr\foo
Shared Folders Troubleshooting
- apt upgrade host and reboot
- vm -> settings -> remove all shared folders
- start vm
- apt upgrade
- sudo rm /media/* -r // remove all shared folders
- reboot
- vm: Menu -> Devices -> Guest Extension -> Download and install
- if errors -> cd /media/.../autorun.sh
- shutdown vm
- vm -> settings -> add shared folder (auto mount)
- start vm
- ls -l /media/sf_xyz/
SSH from host into virtual machine (Ubuntu)
Simple Method
In the vm
- apt-get install openssh-server
- vi /etc/ssh/sshd_config
- PermitRootLogin yes
- Shut down vm
In Virtual box
- Edit vm -> Network settings -> Port Forwarding
- Host port 2222, guest port 22, name ssh, other fields left blank.
Reboot host and guest
On your local compter
- ssh -p 2222 root@localhost
With separate NIC
http://muffinresearch.co.uk/archives/2010/02/08/howto-ssh-into-virtualbox-3-linux-guests/
- VirtualBox: File > Preferences/Global Settings > Network > Add (plus sign)
- Virtual Machine -> Change -> Network -> Adapter 2
- Enable
- Host-only Adapter
- On the host:
- ifconfig
- note the IP for vboxnet0 (e.g. 192.168.56.1)
- Boot the virtual machine
- vi /etc/network/interfaces
- auto eth1
iface eth1 inet static
address 192.168.56.10 #choose another ip in the same network as noted above
netmask 255.255.255.0
- auto eth1
- sudo ifup eth1
Use Bridge Network for PXE Boot
- Network
- Connected to Network Bridge
- Name: select you ethernet network card of host pc
Installing the extension pack / USB 2.0 Support
- Check your Vbox version (Help -> About) - Example: 4.3
- Go to https://www.virtualbox.org/wiki/Downloads and click on "Older builds" or go directly to this links:
https://www.virtualbox.org/wiki/Download_Old_Builds - Select your version - Example: 4.3
- Click on "Extension Pack All Platforms" and download it.
- In the download or file manager: click on the downloaded file to install.
- sudo usermod -a -G vboxusers yourUserName
- Reboot
- Plug in your USB device
- Start virtual box, edit your VM -> USB
- Activate USB 2.0
- Click on the second icon "Add Filter for device" and add your desired device
From http://zcourts.com/2013/06/02/configuring-ubuntu-for-virtualbox-to-detect-usb-devices/
Make harddisk image small
Cleanup Ubuntu
- apt-get clean;apt-get auto-clean;apt-get autoremove
Zero all empty disk space (call from within the vm)
- apt-get install zerofree
- reboot the vm
- Hit "ESC" in grub menu -> Recovery -> drop to root
- mount -o remount,ro /
- zerofree -v /dev/sda1
shrink image
- vboxmanage clonehd image.vmdk image_cloned.vmdk
Removing snapshots
- Always do it from the UI, never delete files manually.
- It may be easier and safer to do a full clone and delete the old machine
Moving disk images
- File -> Virtual Media Manager
- Select disk -> "Release"
- Select disk -> "Delete" but keep on disk!
- Move disk image file to desired location
- Edit the virtual machine -> Storage -> add disk from new location
Create new UUID for a virtual disk image
- VBoxManage internalcommands sethduuid /path/to/disk-image.vmdk
Performance
Virtualbox VBoxClient process uses much CPU
https://askubuntu.com/questions/63420/how-to-fix-virtualboxs-copy-and-paste-to-host-machine
- pkill VBoxClient && sleep 1 && VBoxClient --clipboard
compiz high resource utilization in virtual machine
https://unix.stackexchange.com/questions/386888/compiz-high-resource-utilization-in-virtual-machine
apt-get install gnome-flashback gnome-session-flashback
VM-Config: 3D Acceleration on, 128MB Video RAM
Check with:
- /usr/lib/nux/unity_support_test -p
Other tipps:
- https://www.linuxbabe.com/ubuntu/4-tips-speed-up-ubuntu-16-04
- https://www.linuxbabe.com/virtualbox/speed-up-ubuntu-virtualbox
- https://github.com/akalongman/ubuntu-configuration
Searching for a good backup solution
https://forums.virtualbox.org/viewtopic.php?f=1&t=39362
I use bacula for backup with full backups every month, differential every week and daily incremental. Before the job a shell script is run that manages VM snapshots:
A full backup deletes all snapshots, so that a single base vdi is stored. For differential only daily snapshots are deleted, which consolidates the changes into a single weekly difference. Every day and week new snapshots are taken and labeled as such.
To get back an old version I restore the preceding full and differential backups and some incrementals. That gives me the base vdi and snapshots and the machine description belonging to the target state. Only the execution state gets lost if a machine was running during the backup. Or the script might shut down or save the machines. Anyway, after moving the restored files into place the machines should just work."
https://www.digitalocean.com/community/tutorials/how-to-install-bacula-server-on-ubuntu-14-04
https://github.com/egorFiNE/bigsync/
Check it out
virt-backup
apt-get install libguestfs-tools
virt-sparsify --format raw --convert qcow2 --compress vdisk1.img vdiskcopy.qcow2