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] [<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 SHA1 references in .git/refs/*, and all reflogs (unless
27 --no-reflogs is given) as heads.
30 Print out objects that exist but that aren't reachable from any
31 of the reference nodes.
35 Print objects that exist but that are never 'directly' used (default).
36 `--no-dangling` can be used to omit this information from the output.
45 Consider any object recorded in the index also as a head node for
46 an unreachability trace.
49 Do not consider commits that are referenced only by an
50 entry in a reflog to be reachable. This option is meant
51 only to search for commits that used to be in a ref, but
52 now aren't, but are still in that corresponding reflog.
55 Check not just objects in GIT_OBJECT_DIRECTORY
56 ($GIT_DIR/objects), but also the ones found in alternate
57 object pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES
58 or $GIT_DIR/objects/info/alternates,
59 and in packed git archives found in $GIT_DIR/objects/pack
60 and corresponding pack subdirectories in alternate
61 object pools. This is now default; you can turn it off
65 Enable more strict checking, namely to catch a file mode
66 recorded with g+w bit set, which was created by older
67 versions of git. Existing repositories, including the
68 Linux kernel, git itself, and sparse repository have old
69 objects that triggers this check, but it is recommended
70 to check new projects with this flag.
76 Write dangling objects into .git/lost-found/commit/ or
77 .git/lost-found/other/, depending on type. If the object is
78 a blob, the contents are written into the file, rather than
83 Progress status is reported on the standard error stream by
84 default when it is attached to a terminal, unless
85 --no-progress or --verbose is specified. --progress forces
86 progress status even if the standard error stream is not
87 directed to a terminal.
92 git-fsck tests SHA1 and general object sanity, and it does full tracking
93 of the resulting reachability and everything else. It prints out any
94 corruption it finds (missing or bad objects), and if you use the
95 '--unreachable' flag it will also print out objects that exist but that
96 aren't reachable from any of the specified head nodes (or the default
97 set, as mentioned above).
99 Any corrupt objects you will have to find in backups or other archives
100 (i.e., you can just remove them and do an 'rsync' with some other site in
101 the hopes that somebody else has the object you have corrupted).
103 Extracted Diagnostics
104 ---------------------
106 expect dangling commits - potential heads - due to lack of head information::
107 You haven't specified any nodes as heads so it won't be
108 possible to differentiate between un-parented commits and
111 missing sha1 directory '<dir>'::
112 The directory holding the sha1 objects is missing.
114 unreachable <type> <object>::
115 The <type> object <object>, isn't actually referred to directly
116 or indirectly in any of the trees or commits seen. This can
117 mean that there's another root node that you're not specifying
118 or that the tree is corrupt. If you haven't missed a root node
119 then you might as well delete unreachable nodes since they
122 missing <type> <object>::
123 The <type> object <object>, is referred to but isn't present in
126 dangling <type> <object>::
127 The <type> object <object>, is present in the database but never
128 'directly' used. A dangling commit could be a root node.
130 sha1 mismatch <object>::
131 The database has an object who's sha1 doesn't match the
133 This indicates a serious data integrity problem.
135 Environment Variables
136 ---------------------
138 GIT_OBJECT_DIRECTORY::
139 used to specify the object database root (usually $GIT_DIR/objects)
142 used to specify the index file of the index
144 GIT_ALTERNATE_OBJECT_DIRECTORIES::
145 used to specify additional object database roots (usually unset)
149 Part of the linkgit:git[1] suite