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Shrink VirtualBox Disk Ubuntu

By Tech Writer • • VirtualBox
In order to recover diskspace on your VirtualBox host machine it is necessary to zero out the unused portion of VirtualBox disks. Follow these steps to get the job done.   install zerofree s
In order to recover diskspace on your VirtualBox host machine it is necessary to zero out the unused portion of VirtualBox disks. Follow these steps to get the job done.  
install zerofree sudo apt install zerofree reboot into ubuntu recovery console, hold down [RIGHT SHIFT] advanced options -> recovery mode -> root console find the root directory mount | grep "sda" run zerofree 
echo "u" > /proc/sysrq-trigger
mount /dev/mapper / -o remount,ro
zerofree -v /dev/sda1
shutdown shutdown -h now compress the drive VBoxManage modifyhd /path/to/VDI/VM.vdi --compact source: cyplex from ubuntuforums.org   References:
https://askubuntu.com/questions/1092812/zerofree-on-ubuntu-18-04
#zerofree #recover disk space

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