0store man page

0store ā€” manage the implementation cache




0store audit [ DIRECTORY ... ]


0store find DIGEST

0store list

0store manifest DIRECTORY [ ALGORITHM ]

0store optimise [ CACHE ]

0store verify ( DIGEST | DIRECTORY )

0store manage


0store provides access to the low-level implementation cache. Normally, the cache is updated automatically using 0launch(1).


To add a directory to the store (makes a copy):

0store add sha256=XXX directory

To add an archive to the store:

0store add sha256=XXX archive.tgz

To add a subdirectory of an archive to the store:

0store add sha256=XXX archive.tgz subdir

The actual digest is calculated and compared to the given one. If they don't match, the operation is rejected.


Verifies every implementation in each of the given cache directories, or in all of the default cache directories if no arguments are given. This will detect any packages which have been tampered with since they were unpacked. If 0store itself could have been modified by an attacker, mount the suspect file-system on a known-good machine and run that machine's 0store on the mounted cache directory.

See the "verify" command below for details of the verification performed on each package.


To copy an implementation (a directory with a name in the form "algorithm=value"), use the copy function. This is similar to performing a normal recursive directory copy followed by a 0store verify to check that the name matches the contents. E.g.:

0store copy ~someuser/.cache/0install.net/implementations/sha256=XXX /var/cache/0install.net/implementations/


To find the path of a stored item:

0store find sha256=XXX


See the list of implementation caches currently configured:

0store list

To add directories to this list, add them to your 'implementation-dirs' configuration file.


To open a window showing the contents of the cache:

0store manage

You can use this to delete versions of programs you no longer need. However, this doesn't remove any launchers you added (trying to launch the program will prompt you to download the missing files again). For that, try:

0desktop --manage


To generate the manifest for a directory structure:

0store manifest DIRECTORY [ALGORITHM]

The manifest lists every file and directory in the tree, along with the digest of each file, thus uniquely identifying that particular set of files. After the manifest, the last line gives the digest of the manifest itself.

This value is needed when creating feed files. However, the 0publish command will automatically calculate the required digest for you and add it to a feed file. See the packager's guide on the Zero Install web site for details.

Supported algorithms are 'sha1' (supported by all versions), 'sha1new' (requires injector 0.20 or later) and 'sha256' (requires injector 0.20 or later AND the Python hashlib module).


To hard-link duplicate files together to save space:

0store optimise [CACHE]

This reads in all the manifest files in the cache directory (~/.cache/0install.net/implementations by default) and looks for duplicates (files with the same permissions, modification time and digest). When it finds a pair, it deletes one and replaces it (atomically) with a hard-link to the other.

Implementations using the old 'sha1' algorithm are not optimised.


To check that an item is stored correctly:

0store verify /path/to/sha256=XXX

This calculates the manifest of the directory and checks that its digest matches the directory's name. It also checks that it matches the digest of the .manifest file inside the directory. If the .manifest doesn't correspond to the current tree, it displays a list of the differences (in unified diff format).

Command-Line Options

-h, --help

Show the built-in help text.

-v, --verbose

More verbose output. Use twice for even more verbose output.

-V, --version

Display version information.



Cached implementations, indexed by manifest digest.


List of system cache directories, one per line.


Copyright (C) 2010 Thomas Leonard.

You may redistribute copies of this program under the terms of the GNU Lesser General Public License.


Please report bugs to the developer mailing list:



The Zero Install Injector was created by Thomas Leonard.

See Also

0alias(1), 0launch(1), 0store-secure-add(1)

The Zero Install web-site:


Referenced By

0install(1), 0launch(1), 0store-secure-add(1).

2010 Thomas Leonard