Bhyve disk resize¶

vm stop freebsd13
cd /vm/freebsd13
truncate -s 40G disk0.img
vm start freebsd13

If you are not sure about that – you may work on a copy instead.

vm stop freebsd13
truncate -s 40G disk0.img.NEW
dd bs=1m if=disk0.img of=disk0.img.NEW conv=notrunc status=progress

mv disk0.img disk0.img.BACKUP
mv disk0.img.NEW disk0.img
vm start freebsd13