6 git-fsck - Verifies the connectivity and validity of the objects in the database
12 'git fsck' [--tags] [--root] [--unreachable] [--cache] [--no-reflogs]
13 [--[no-]full] [--strict] [--verbose] [--lost-found]
14 [--[no-]dangling] [--[no-]progress] [--connectivity-only] [<object>*]
18 Verifies the connectivity and validity of the objects in the database.
23 An object to treat as the head of an unreachability trace.
25 If no objects are given, 'git fsck' defaults to using the
26 index file, all SHA-1 references in `refs` namespace, and all reflogs
27 (unless --no-reflogs is given) as heads.
30 Print out objects that exist but that aren't reachable from any
31 of the reference nodes.
34 Print objects that exist but that are never 'directly' used (default).
35 `--no-dangling` can be used to omit this information from the output.
44 Consider any object recorded in the index also as a head node for
45 an unreachability trace.
48 Do not consider commits that are referenced only by an
49 entry in a reflog to be reachable. This option is meant
50 only to search for commits that used to be in a ref, but
51 now aren't, but are still in that corresponding reflog.
54 Check not just objects in GIT_OBJECT_DIRECTORY
55 ($GIT_DIR/objects), but also the ones found in alternate
56 object pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES
57 or $GIT_DIR/objects/info/alternates,
58 and in packed Git archives found in $GIT_DIR/objects/pack
59 and corresponding pack subdirectories in alternate
60 object pools. This is now default; you can turn it off
64 Check only the connectivity of tags, commits and tree objects. By
65 avoiding to unpack blobs, this speeds up the operation, at the
66 expense of missing corrupt objects or other problematic issues.
69 Enable more strict checking, namely to catch a file mode
70 recorded with g+w bit set, which was created by older
71 versions of Git. Existing repositories, including the
72 Linux kernel, Git itself, and sparse repository have old
73 objects that triggers this check, but it is recommended
74 to check new projects with this flag.
80 Write dangling objects into .git/lost-found/commit/ or
81 .git/lost-found/other/, depending on type. If the object is
82 a blob, the contents are written into the file, rather than
86 Progress status is reported on the standard error stream by
87 default when it is attached to a terminal, unless
88 --no-progress or --verbose is specified. --progress forces
89 progress status even if the standard error stream is not
90 directed to a terminal.
95 git-fsck tests SHA-1 and general object sanity, and it does full tracking
96 of the resulting reachability and everything else. It prints out any
97 corruption it finds (missing or bad objects), and if you use the
98 '--unreachable' flag it will also print out objects that exist but that
99 aren't reachable from any of the specified head nodes (or the default
100 set, as mentioned above).
102 Any corrupt objects you will have to find in backups or other archives
103 (i.e., you can just remove them and do an 'rsync' with some other site in
104 the hopes that somebody else has the object you have corrupted).
106 Extracted Diagnostics
107 ---------------------
109 expect dangling commits - potential heads - due to lack of head information::
110 You haven't specified any nodes as heads so it won't be
111 possible to differentiate between un-parented commits and
114 missing sha1 directory '<dir>'::
115 The directory holding the sha1 objects is missing.
117 unreachable <type> <object>::
118 The <type> object <object>, isn't actually referred to directly
119 or indirectly in any of the trees or commits seen. This can
120 mean that there's another root node that you're not specifying
121 or that the tree is corrupt. If you haven't missed a root node
122 then you might as well delete unreachable nodes since they
125 missing <type> <object>::
126 The <type> object <object>, is referred to but isn't present in
129 dangling <type> <object>::
130 The <type> object <object>, is present in the database but never
131 'directly' used. A dangling commit could be a root node.
133 sha1 mismatch <object>::
134 The database has an object who's sha1 doesn't match the
136 This indicates a serious data integrity problem.
138 Environment Variables
139 ---------------------
141 GIT_OBJECT_DIRECTORY::
142 used to specify the object database root (usually $GIT_DIR/objects)
145 used to specify the index file of the index
147 GIT_ALTERNATE_OBJECT_DIRECTORIES::
148 used to specify additional object database roots (usually unset)
152 Part of the linkgit:git[1] suite