Projects / libguestfs


libguestfs is a set of tools for accessing and modifying virtual machine (VM) disk images. You can use this for viewing and editing files inside guests, scripting changes to VMs, monitoring disk used/free statistics, P2V, V2V, performing partial backups, cloning VMs, and much more. libguestfs can access nearly any type of filesystem including: all known types of Linux filesystem (ext2/3/4, XFS, btrfs, etc.), any Windows filesystem (VFAT and NTFS), any Mac OS X and BSD filesystems, LVM2 volumes, MBR and GPT disk partitions, raw disks, qcow2, CD and DVD ISO images, SD cards, and dozens more. libguestfs doesn't need root permissions.

Operating Systems

Recent releases

  •  19 Oct 2013 20:26

    Release Notes: This release adds the tool virt-builder to rapidly and securely create new virtual machines. User-Mode Linux (UML) can now be used as a backend (instead of KVM). virt-resize and virt-sysprep can use URIs to work on remote disks. Bindings have been added for the Go programming language. This release supports the systemd journal, setting qemu caching mode, and ARM (32 bit) and PowerPC 64.

    •  13 Dec 2012 18:42

      Release Notes: This release adds SVirt for secure containment of guests. It supports disk hotplugging and up to 255 disk images at once. New support for: POSIX ACLs, Linux capabilities, Windows dynamic disks, and Lua bindings. Multiple enhancements to virt-sysprep. Supports rsync to synchronize disk images with the host filesystem (both ways). Dozens of bugfixes.

      •  22 May 2012 16:59

        Release Notes: virt-sysprep has been rewritten and expanded. virt-sparsify can find more sparseness in Linux guests. virt-make-fs can make btrfs. virt-edit preserves all IDs and file permissions. FUSE is included directly in the core API. Over 30 bugs have been fixed.

        •  28 Oct 2011 14:52

          Release Notes: New virt-alignment-scan, virt-sparsify, and virt-sysprep tools were added. Virt-resize can now resize Ubuntu guests, and fix alignment issues in Windows and Linux guests. 'guestmount --live' works. Systemtap support was added. Virt-cat now supports Windows drive letters and paths. Erlang bindings were added. 18 bugs have been official fixed, and many more unofficially.

          •  21 Jul 2011 15:09

            Release Notes: Virt-inspector can now extract OS icons from VMs. Virt-resize can resize guests using btrfs. Guestfish can be used to append to files. Virt-ls supports an easily greppable output format Virt-win-reg supports HKEY_USERS. Java is now a first class supported language. Many incremental improvements throughout the virt tools.


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