VirtualBox decrease disk size¶
Host OS — Windows. Guest OS — Linux¶
Unmount disk which need to resize or start from LiveCD.
On VM:
sudo apt-get install zerofree
sudo zerofree /dev/sda1
# /dev/sda1 - your partition
On host Windows:
cd C:\Program Files\Oracle\VirtualBox
VBoxManage modifyhd <path\to\vdi_file.vdi> --compact
Host OS and guest OS — Linux¶
On guest:
# fill zeros all free space
# 'bs=' - sector size
dd if=/dev/zero of=zero bs=512k
# remove zero file
rm zero
On host:
vboxmanage modifyhd </path/to/thedisk.vdi> --compact