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zerofree - Utility to force unused ext2/3/4 inodes and blocks to zero

Zerofree finds the unallocated blocks with non-zero value content in an ext2, ext3 or ext4 file-system and fills them with zeroes (zerofree can also work with another value than zero). This is mostly useful if the device on which this file-system resides is a disk image. In this case, depending on the type of disk image, a secondary utility may be able to reduce the size of the disk image after zerofree has been run. Zerofree requires the file-system to be unmounted or mounted read-only.
The usual way to achieve the same result (zeroing the unused blocks) is to run "dd" to create a file full of zeroes that takes up the entire free space on the drive, and then delete this file. This has many disadvantages, which zerofree alleviates:
  • it is slow;
  • it makes the disk image (temporarily) grow to its maximal extent;
  • it (temporarily) uses all free space on the disk, so other concurrent write actions may fail.
Zerofree has been written to be run from GNU/Linux systems installed as guest OSes inside a virtual machine. If this is not your case, you almost certainly don't need this package. (One other use case would be to erase sensitive data a little bit more securely than with a simple "rm").
Original maintainer
Homepagehttps://frippery.org/uml/
1.1.1
Debian iconDebian 10.0
Fedora iconFedora 28
Fedora iconFedora 29
Fedora iconFedora 30
Fedora iconFedora rawhide
OpenSUSE iconOpenSUSE Tumbleweed
Ubuntu iconUbuntu 18.10
Ubuntu iconUbuntu 19.04
Ubuntu iconUbuntu 19.10
1.0.4
Debian iconDebian 9.0
OpenSUSE iconOpenSUSE Leap 15.0
OpenSUSE iconOpenSUSE Leap 15.1
Ubuntu iconUbuntu 17.10
Ubuntu iconUbuntu 18.04 LTS
1.0.3
OpenSUSE iconOpenSUSE Leap 42.3
Ubuntu iconUbuntu 16.04 LTS
DistributionVersionSincePackageInstalledPackager
Debian iconDebian 10.0 buster/maindeb1.1.1-1Jan 128.23 kiB25 kiB
Debian iconDebian 9.0 stretch/maindeb1.0.4-12017-11-107.87 kiB25 kiB
Fedora iconFedora 28 releases/Everything-osrpm1.1.1-1.fc28Jan 1429.2 kiB45.7 kiBFedora Project
Fedora iconFedora 28 releases/Server-osrpm1.1.1-1.fc28Jan 1429.2 kiB45.7 kiBFedora Project
Fedora iconFedora 28 releases/Workstation-osrpm1.1.1-1.fc28Jan 1429.2 kiB45.7 kiBFedora Project
Fedora iconFedora 29 releases/Everything-osrpm1.1.1-2.fc29Jan 1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases/Server-osrpm1.1.1-2.fc29Jan 1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases/Workstation-osrpm1.1.1-2.fc29Jan 1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases-test/Everything-osrpm1.1.1-2.fc29Jan 1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases-test/Server-osrpm1.1.1-2.fc29Jan 1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases-test/Workstation-osrpm1.1.1-2.fc29Jan 1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 30 releases/Everything-osrpm1.1.1-3.fc30Jun 1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases/Server-osrpm1.1.1-3.fc30Jun 1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases/Workstation-osrpm1.1.1-3.fc30Jun 1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases-test/Server-osrpm1.1.1-3.fc30Jun 1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases-test/Workstation-osrpm1.1.1-3.fc30Jun 1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora rawhide development/Everything-osrpm1.1.1-4.fc31Aug 0327.3 kiB55.9 kiBFedora Project
Fedora iconFedora rawhide development/Workstation-osrpm1.1.1-4.fc31Aug 0327.3 kiB55.9 kiBFedora Project
OpenSUSE iconOpenSUSE Leap 15.0 ossrpm1.0.4-lp150.1.8Jan 1722.2 kiB39.7 kiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.1 ossrpm1.0.4-lp151.2.3Jan 2322.1 kiB39.6 kiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 ossrpm1.0.3-11.1Jan 1717.3 kiB39.7 kiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Tumbleweed ossrpm1.1.1-1.5Jul 1622.2 kiB47.7 kiBhttps://bugs.opensuse.org
Ubuntu iconUbuntu 17.10 artful/maindeb1.0.4-12017-11-107.92 kiB25 kiB
Ubuntu iconUbuntu 18.04 LTS bionic/maindeb1.0.4-12017-11-107.92 kiB25 kiB
Ubuntu iconUbuntu 18.10 cosmic/maindeb1.1.1-1Jan 148.32 kiB25 kiB
Ubuntu iconUbuntu 19.04 disco/maindeb1.1.1-1Jan 148.32 kiB25 kiB
Ubuntu iconUbuntu 19.10 eoan/maindeb1.1.1-1Jun 178.32 kiB25 kiB
Ubuntu iconUbuntu 16.04 LTS xenial/maindeb1.0.3-12017-11-107.74 kiB50 kiB

Manual pages

zerofree(8)

zerofree — zero free blocks from ext2/3 file-systems

Latest updates

Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 reintroduced

Aug 19
  • Bug fix: "new upstream version", thanks to Christoph Anton Mitterer (Closes: #892518).
  • Update VCS fields to salsa, use https in watch file, make lintian-clean.
  • Check against Policy 4.1.3.
Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 removed

Aug 19
Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 reintroduced

Aug 14
  • Bug fix: "new upstream version", thanks to Christoph Anton Mitterer (Closes: #892518).
  • Update VCS fields to salsa, use https in watch file, make lintian-clean.
  • Check against Policy 4.1.3.
Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 removed

Aug 14
Fedora rawhide icon

Fedora rawhide development/Workstation-os: Updated from 1.1.1-3.fc31 to 1.1.1-4.fc31

Aug 03
Fedora rawhide icon

Fedora rawhide development/Everything-os: Updated from 1.1.1-3.fc31 to 1.1.1-4.fc31

Aug 03
Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 reintroduced

Aug 02
  • Bug fix: "new upstream version", thanks to Christoph Anton Mitterer (Closes: #892518).
  • Update VCS fields to salsa, use https in watch file, make lintian-clean.
  • Check against Policy 4.1.3.
Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 removed

Aug 01
Fedora rawhide icon

Fedora rawhide development/Server-os: Version 1.1.1-3.fc31 removed

Jul 25
Fedora rawhide icon

Fedora rawhide development/Everything-os: Updated from 1.1.1-3.fc30 to 1.1.1-3.fc31

Jul 25
Fedora rawhide icon

Fedora rawhide development/Server-os: Updated from 1.1.1-3.fc30 to 1.1.1-3.fc31

Jul 24
Fedora rawhide icon

Fedora rawhide development/Workstation-os: Updated from 1.1.1-3.fc30 to 1.1.1-3.fc31

Jul 24
OpenSUSE Tumbleweed icon

OpenSUSE Tumbleweed oss: Updated from 1.1.1-1.4 to 1.1.1-1.5

Jul 16
  • update to 1.1.1:
    • Lift call to ext2fs_free_blocks_count out of loop
    • Add support for 64-bit block numbers
OpenSUSE Tumbleweed icon

OpenSUSE Tumbleweed oss: Updated from 1.1.1-1.2 to 1.1.1-1.4

Jun 17
  • update to 1.1.1:
    • Lift call to ext2fs_free_blocks_count out of loop
    • Add support for 64-bit block numbers
Fedora 30 icon

Fedora 30 releases/Everything-os: Version 1.1.1-3.fc30 introduced

Jun 17
Fedora 30 icon

Fedora 30 releases-test/Workstation-os: Version 1.1.1-3.fc30 introduced

Jun 17
Fedora 30 icon

Fedora 30 releases-test/Server-os: Version 1.1.1-3.fc30 introduced

Jun 17
Fedora 30 icon

Fedora 30 releases/Workstation-os: Version 1.1.1-3.fc30 introduced

Jun 17
Fedora 30 icon

Fedora 30 releases/Server-os: Version 1.1.1-3.fc30 introduced

Jun 17
Ubuntu 19.10 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 introduced

Jun 17
  • Bug fix: "new upstream version", thanks to Christoph Anton Mitterer (Closes: #892518).
  • Update VCS fields to salsa, use https in watch file, make lintian-clean.
  • Check against Policy 4.1.3.

Related packages

zerofree-debuginfo - Debug information for package zerofree
zerofree-debugsource - Debug sources for package zerofree
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