git-fsck - Verifies the connectivity and validity of the objects in the database
git fsck [--tags] [--root] [--unreachable] [--cache] [--no-reflogs]
[--[no-]full] [--strict] [--verbose] [--lost-found]
[--[no-]dangling] [--[no-]progress] [--connectivity-only]
Verifies the connectivity and validity of the objects in the database.
An object to treat as the head of an unreachability
If no objects are given, git fsck defaults to using the
index file, all SHA-1 references in refs namespace, and all reflogs
(unless --no-reflogs is given) as heads.
Print out objects that exist but that aren’t
reachable from any of the reference nodes.
Print objects that exist but that are never
directly used (default). --no-dangling can be used to omit this
information from the output.
Report root nodes.
Consider any object recorded in the index also as a head
node for an unreachability trace.
Do not consider commits that are referenced only by an
entry in a reflog to be reachable. This option is meant only to search for
commits that used to be in a ref, but now aren’t, but are still in that
Check not just objects in GIT_OBJECT_DIRECTORY
($GIT_DIR/objects), but also the ones found in alternate object pools listed
in GIT_ALTERNATE_OBJECT_DIRECTORIES or $GIT_DIR/objects/info/alternates, and
in packed Git archives found in $GIT_DIR/objects/pack and corresponding pack
subdirectories in alternate object pools. This is now default; you can turn it
off with --no-full.
Check only the connectivity of tags, commits and tree
objects. By avoiding to unpack blobs, this speeds up the operation, at the
expense of missing corrupt objects or other problematic issues.
Enable more strict checking, namely to catch a file mode
recorded with g+w bit set, which was created by older versions of Git.
Existing repositories, including the Linux kernel, Git itself, and sparse
repository have old objects that triggers this check, but it is recommended to
check new projects with this flag.
Write dangling objects into .git/lost-found/commit/ or
.git/lost-found/other/, depending on type. If the object is a blob, the
contents are written into the file, rather than its object name.
When displaying names of reachable objects, in addition
to the SHA-1 also display a name that describes how
they are reachable,
compatible with git-rev-parse(1)
Progress status is reported on the standard error stream
by default when it is attached to a terminal, unless --no-progress or
--verbose is specified. --progress forces progress status even if the standard
error stream is not directed to a terminal.
git-fsck tests SHA-1 and general object sanity, and it does full tracking of the
resulting reachability and everything else. It prints out any corruption it
finds (missing or bad objects), and if you use the --unreachable flag
it will also print out objects that exist but that aren’t reachable
from any of the specified head nodes (or the default set, as mentioned above).
Any corrupt objects you will have to find in backups or other
archives (i.e., you can just remove them and do an rsync with some
other site in the hopes that somebody else has the object you have
If core.commitGraph is true, the commit-graph file will also be
inspected using git commit-graph verify. See
expect dangling commits - potential heads - due to lack of head information
You haven’t specified any nodes as heads so it
won’t be possible to differentiate between un-parented commits and root
missing sha1 directory <dir>
The directory holding the sha1 objects is missing.
unreachable <type> <object>
The <type> object <object>, isn’t
actually referred to directly or indirectly in any of the trees or commits
seen. This can mean that there’s another root node that you’re
not specifying or that the tree is corrupt. If you haven’t missed a
root node then you might as well delete unreachable nodes since they
can’t be used.
missing <type> <object>
The <type> object <object>, is referred to
but isn’t present in the database.
dangling <type> <object>
The <type> object <object>, is present in the
database but never directly used. A dangling commit could be a root
hash mismatch <object>
The database has an object whose hash doesn’t
match the object database value. This indicates a serious data integrity
used to specify the object database root (usually
used to specify the index file of the index
used to specify additional object database roots (usually