73 lines
2.4 KiB
Groff
73 lines
2.4 KiB
Groff
.TH DU 1L \" -*- nroff -*-
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.SH NAME
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du \- summarize disk usage
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.SH SYNOPSIS
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.B du
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[\-abcklsxDLS] [\-\-all] [\-\-total] [\-\-count-links] [\-\-summarize]
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[\-\-bytes] [\-\-kilobytes] [\-\-one-file-system] [\-\-separate-dirs]
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[\-\-dereference] [\-\-dereference-args] [path...]
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.SH DESCRIPTION
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This manual page
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documents the GNU version of
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.BR du .
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.B du
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displays the amount of disk space used by each argument and for each
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subdirectory of directory arguments. The space is measured in 1K
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blocks by default, unless the environment variable POSIXLY_CORRECT is
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set, in which case 512-byte blocks are used.
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.SS OPTIONS
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.TP
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.I "\-a, \-\-all"
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Display counts for all files, not just directories.
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.TP
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.I "\-b, \-\-bytes"
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Print sizes in bytes.
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.TP
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.I "\-c, \-\-total"
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Write a grand total of all of the arguments after all
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arguments have been processed. This can be used to find
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out the disk usage of a directory, with some files excluded.
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.TP
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.I "\-k, \-\-kilobytes"
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Print sizes in kilobytes. This overrides the environment variable
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POSIXLY_CORRECT.
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.TP
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.I "\-l, \-\-count-links"
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Count the size of all files, even if they have appeared already in
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another hard link.
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.TP
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.I "\-s, \-\-summarize"
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Display only a total for each argument.
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.TP
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.I "\-x, \-\-one-file-system"
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Skip directories that are on different filesystems from the one that
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the argument being processed is on.
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.TP
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.I "\-D, \-\-dereference-args"
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Dereference symbolic links that are command line arguments. Does not
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affect other symbolic links. This is helpful for finding out the disk
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usage of directories like /usr/tmp where they are symbolic links.
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.TP
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.I "\-L, \-\-dereference"
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Dereference symbolic links (show the disk space used by the file or
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directory that the link points to instead of the space used by the
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link).
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.TP
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.I "\-S, \-\-separate-dirs"
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Count the size of each directory separately, not including the sizes
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of subdirectories.
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.SH BUGS
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On BSD systems,
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.B du
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reports sizes that are half the correct values for files that are
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NFS-mounted from HP-UX systems. On HP-UX systems, it reports sizes
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that are twice the correct values for files that are NFS-mounted from
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BSD systems. This is due to a flaw in HP-UX; it also affects the
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HP-UX
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.B du
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program.
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.PP
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The long-named options can be introduced with `+' as well as `\-\-',
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for compatibility with previous releases. Eventually support for `+'
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will be removed, because it is incompatible with the POSIX.2 standard.
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