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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 31
Fedora iconFedora rawhide
OpenSUSE iconOpenSUSE Tumbleweed
Ubuntu iconUbuntu 18.10
Ubuntu iconUbuntu 19.04
Ubuntu iconUbuntu 19.10
Ubuntu iconUbuntu 20.04
1.0.4
Debian iconDebian 9.0
OpenSUSE iconOpenSUSE Leap 15.0
OpenSUSE iconOpenSUSE Leap 15.1
OpenSUSE iconOpenSUSE Leap 15.2
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/maindeb1.1.1-12019-01-128.23 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.fc282019-01-1429.2 kiB45.7 kiBFedora Project
Fedora iconFedora 28 releases/Server-osrpm1.1.1-1.fc282019-01-1429.2 kiB45.7 kiBFedora Project
Fedora iconFedora 28 releases/Workstation-osrpm1.1.1-1.fc282019-01-1429.2 kiB45.7 kiBFedora Project
Fedora iconFedora 29 releases/Everything-osrpm1.1.1-2.fc292019-01-1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases/Server-osrpm1.1.1-2.fc292019-01-1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases/Workstation-osrpm1.1.1-2.fc292019-01-1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases-test/Everything-osrpm1.1.1-2.fc292019-01-1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases-test/Server-osrpm1.1.1-2.fc292019-01-1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 29 releases-test/Workstation-osrpm1.1.1-2.fc292019-01-1426.7 kiB56.3 kiBFedora Project
Fedora iconFedora 30 releases/Everything-osrpm1.1.1-3.fc302019-06-1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases/Server-osrpm1.1.1-3.fc302019-06-1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases/Workstation-osrpm1.1.1-3.fc302019-06-1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases-test/Server-osrpm1.1.1-3.fc302019-06-1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 30 releases-test/Workstation-osrpm1.1.1-3.fc302019-06-1727.1 kiB65.7 kiBFedora Project
Fedora iconFedora 31 releases/Everything-osrpm1.1.1-4.fc31Jan 0727.3 kiB55.9 kiBFedora Project
Fedora iconFedora rawhide development/Everything-osrpm1.1.1-5.fc32Feb 0827.2 kiB55.1 kiBFedora Project
Fedora iconFedora rawhide development/Workstation-osrpm1.1.1-4.fc312019-08-0327.3 kiB55.9 kiBFedora Project
OpenSUSE iconOpenSUSE Leap 15.0 ossrpm1.0.4-lp150.1.82019-01-1722.2 kiB39.7 kiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.1 ossrpm1.0.4-lp151.2.32019-01-2322.1 kiB39.6 kiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.2 ossrpm1.0.4-lp152.3.6Jan 1722.1 kiB39.6 kiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 ossrpm1.0.3-11.12019-01-1717.3 kiB39.7 kiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Tumbleweed ossrpm1.1.1-1.6Mar 1422.2 kiB47.8 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/maindeb1.1.1-12019-01-148.32 kiB25 kiB
Ubuntu iconUbuntu 19.04 disco/maindeb1.1.1-12019-01-148.32 kiB25 kiB
Ubuntu iconUbuntu 19.10 eoan/maindeb1.1.1-12019-06-178.32 kiB25 kiB
Ubuntu iconUbuntu 20.04 focal/maindeb1.1.1-1Jan 078.32 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

OpenSUSE icon

OpenSUSE Tumbleweed oss: Updated from 1.1.1-1.5 to 1.1.1-1.6

Mar 14
  • update to 1.1.1:
    • Lift call to ext2fs_free_blocks_count out of loop
    • Add support for 64-bit block numbers
Fedora icon

Fedora rawhide development/Everything-os: Updated from 1.1.1-4.fc31 to 1.1.1-5.fc32

Feb 08
OpenSUSE icon

OpenSUSE Leap 15.2 oss: Updated from 1.0.4-lp152.3.5 to 1.0.4-lp152.3.6

Jan 17
  • adjust urls to new location
Fedora icon

Fedora 31 releases/Everything-os: Version 1.1.1-4.fc31 introduced

Jan 07
OpenSUSE icon

OpenSUSE Leap 15.2 oss: Version 1.0.4-lp152.3.5 introduced

Jan 07
  • adjust urls to new location
Ubuntu icon

Ubuntu 20.04 focal/main: Version 1.1.1-1 introduced

Jan 07
  • 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 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 reintroduced

2019-08-19
  • 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 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 removed

2019-08-19
Ubuntu icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 reintroduced

2019-08-14
  • 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 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 removed

2019-08-14
Fedora icon

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

2019-08-03
Fedora icon

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

2019-08-03
Ubuntu icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 reintroduced

2019-08-02
  • 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 icon

Ubuntu 19.10 eoan/main: Version 1.1.1-1 removed

2019-08-01
Fedora icon

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

2019-07-25
Fedora icon

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

2019-07-25
Fedora icon

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

2019-07-24
Fedora icon

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

2019-07-24
OpenSUSE icon

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

2019-07-16
  • update to 1.1.1:
    • Lift call to ext2fs_free_blocks_count out of loop
    • Add support for 64-bit block numbers
OpenSUSE icon

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

2019-06-17
  • update to 1.1.1:
    • Lift call to ext2fs_free_blocks_count out of loop
    • Add support for 64-bit block numbers

Related packages

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