Libguestfs is a library for accessing and modifying guest disk images.
Amongst the things this is good for: making batch configuration
changes to guests, getting disk used/free statistics (see also:
virt-df), migrating between virtualization systems (see also:
virt-p2v), performing partial backups, performing partial guest
clones, cloning guests and changing registry/UUID/hostname info, and
much else besides.
Libguestfs uses Linux kernel and qemu code, and can access any type of
guest filesystem that Linux and qemu can, including but not limited
to: ext2/3/4, btrfs, FAT and NTFS, LVM, many different disk partition
schemes, qcow, qcow2, vmdk.
Libguestfs provides ways to enumerate guest storage (eg. partitions,
LVs, what filesystem is in each LV, etc.). It can also run commands
in the context of the guest.
Libguestfs is a library that can be linked with C and C++ management
programs.
For high level virt tools, guestfish (shell scripting and command line
access), and guestmount (mount guest filesystems using FUSE), install
'libguestfs-tools'.
For shell scripting and command line access, install 'guestfish'.
To mount guest filesystems on the host using FUSE, install
'libguestfs-mount'.
For Erlang bindings, install 'erlang-libguestfs'.
For Java bindings, install 'libguestfs-java-devel'.
For OCaml bindings, install 'ocaml-libguestfs-devel'.
For Perl bindings, install 'perl-Sys-Guestfs'.
For PHP bindings, install 'php-libguestfs'.
For Python bindings, install 'python-libguestfs'.
For Ruby bindings, install 'ruby-libguestfs'.