MyWackoSite: libguestfs

export LIBGUESTFS_DEBUG=1
export LIBGUESTFS_TRACE=1

# guestmount -a /vm/images/archlinux/archlinux.qcow2 -m /dev/sda1 --ro /mnt/

# virt-filesystems -a archlinux.qcow2 --all --long -h

# virt-df -a archlinux.qcow2 -h
Filesystem                                Size       Used  Available  Use%
archlinux.qcow2:/dev/sda1                 3,8G       485M       3,1G   13%

# virt-filesystems -a archlinux.qcow2
/dev/sda1

# virt-rescue --ro -a archlinux.qcow2

Welcome to virt-rescue, the libguestfs rescue shell.

Note: The contents of / are the rescue appliance.
You have to mount the guest's partitions under /sysroot
before you can examine them.

[root@(none) /]#

# virt-cat -a archlinux.qcow2 /etc/fstab

# guestmount --rw -d winxp -m /dev/sda1 /media/
# guestmount --rw -d winxp -i /media/
# guestmount --rw -a winxp.qcow2 -i /media/

# fusermount -u /media

# guestfish -N fs:ntfs -m /dev/sda1 touch /this-is-a-test

This will create an empty NTFS filesystem in a disk image (called
'test1.img'), then touch one file.  Since it doesn't involve any
existing filesystems or guests it's a good test of whether ntfs-3g is
working or broken.

You can also run:

$ strings -e l test1.img

to look at strings in the test image.