VirtualBox
- Run
defrag
in the Windows Guest - Nullify free space:
Linux Guest
sudo dd if=/dev/zero | pv | sudo dd of=/bigemptyfile bs=4096k
sudo rm -rf /bigemptyfile
OR
telinit 1
mount -o remount,ro /dev/sda1
zerofree -v /dev/sda1
Windows Guest
cleanmgr
del C:\Windows\SoftwareDistribution\Download
del C:\Windows\Temp
del C:\Documents and Settings\<user>\Local Settings\Temp
del C:\Windows\$Nt*Uninstall*
rem http://cdn.chorke.org/soft/winx/sdelete/sdelete.zip
sdelete.exe c: -z
sdelete.exe d: -z
Compact
VBoxManage modifyhd xp-msql-box.vdi --compact VBoxManage modifyhd xp-base-box.vdi --compact
OR
VBoxManage.exe modifymedium --compact xp-base-box.vdi VBoxManage modifymedium --compact xp-base-box.vdi vboxmanage modifymedium --compact xp-base-box.vdi
Knowledge
sudo apt install -y cpu-checker kvm-ok
virtualbox before start sudo systemctl stop virtlogd.socket sudo systemctl stop virtlogd.service sudo systemctl disable virtlogd.service sudo systemctl stop libvirtd.socket sudo systemctl stop libvirtd.service sudo systemctl disable libvirtd.service sudo systemctl enable virtualbox.service sudo systemctl start virtualbox.service