73 lines
2.8 KiB
Groff
73 lines
2.8 KiB
Groff
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.TH "hardlink" "1"
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.SH "NAME"
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hardlink \- Consolidate duplicate files via hardlinks
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.SH "SYNOPSIS"
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.B hardlink
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[options]
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.RI [ directory ...]
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.SH "DESCRIPTION"
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.PP
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This manual page documents \fBhardlink\fR, a
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program which consolidates duplicate files in one or more directories
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using hardlinks.
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.PP
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\fBhardlink\fR traverses one
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or more directories searching for duplicate files. When it finds duplicate
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files, it uses one of them as the master. It then removes all other
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duplicates and places a hardlink for each one pointing to the master file.
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This allows for conservation of disk space where multiple directories
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on a single filesystem contain many duplicate files.
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.PP
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Since hard links can only span a single filesystem, \fBhardlink\fR
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is only useful when all directories specified are on the same filesystem.
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.SH "OPTIONS"
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.TP
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.BR \-c , " \-\-content"
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Compare only the contents of the files being considered for consolidation.
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Disregards permission, ownership and other differences.
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.TP
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.BR \-f , " \-\-force"
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Force hardlinking across file systems.
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.TP
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.BR \-n , " \-\-dry\-run"
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Do not perform the consolidation; only print what would be changed.
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.TP
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.BR \-v , " \-\-verbose"
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Print summary after hardlinking. The option may be specified more than once. In
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this case (e.g. \fB-vv\fR) it prints every hardlinked file and bytes saved.
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.TP
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.BR \-x , " \-\-exclude " \fIregex\fR
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Exclude files and directories matching pattern from hardlinking.
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.sp
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The optional pattern for excluding files and directories must be a PCRE2
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compatible regular expression. Only the basename of the file or directory
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is checked, not its path. Excluded directories' contents will not be examined.
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.TP
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.BR \-h , " \-\-help"
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Display help text and exit.
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.TP
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.BR \-V , " \-\-version"
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Display version information and exit.
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.SH "AUTHOR"
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.PP
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\fBhardlink\fR was written by Jakub Jelinek <jakub@redhat.com> and later modified by
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Ruediger Meier <ruediger.meier@ga-group.nl> and Karel Zak <kzak@redhat.com> for util-linux.
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.PP
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Man page written by Brian Long and later updated by Jindrich Novy <jnovy@redhat.com>
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.SH "BUGS"
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.PP
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\fBhardlink\fR assumes that its target directory trees do not change from under
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it. If a directory tree does change, this may result in \fBhardlink\fR
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accessing files and/or directories outside of the intended directory tree.
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Thus, you must avoid running \fBhardlink\fR on potentially changing directory
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trees, and especially on directory trees under control of another user.
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.PP
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Historically \fBhardlink\fR silently excluded any names beginning with
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".in.", as well as any names beginning with "." followed by exactly 6
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other characters. That prior behavior can be achieved by specifying
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.br
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-x '^(\\.in\\.|\\.[^.]{6}$)'
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.SH AVAILABILITY
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The hardlink command is part of the util-linux package and is available from
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https://www.kernel.org/pub/linux/utils/util-linux/.
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