Project Summary
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 has bindings for C, C++, OCaml, Perl, Python, Ruby or Java.
In a Nutshell, libguestfs...
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has a well established, mature codebase
maintained by a very large development team
with increasing Y-O-Y commits -
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took an estimated 91 years of effort (COCOMO model)
starting with its first commit in March, 2009
ending with its most recent commit 3 days ago
GNU General Public License v2.0 or later
Permitted
Commercial Use
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Distribute
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These details are provided for information only. No information here is legal advice and should not be used as such.
GNU Lesser General Public License v2.1 or later
Permitted
Commercial Use
Modify
Distribute
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
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Vulnerability Exposure Index
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30 Day SummaryJan 25 2026 — Feb 24 2026
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12 Month SummaryFeb 24 2025 — Feb 24 2026
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