137 lines
2.2 KiB
Text
137 lines
2.2 KiB
Text
.TH DU 1
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.SH NAME
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du \- disk usage
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.SH SYNOPSIS
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.B du
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[
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.B -aefhnqstu
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] [
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.B -b
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.I size
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] [
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.B -p
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.I SI-prefix
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] [
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.I file ...
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]
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.SH DESCRIPTION
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.I Du
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gives the number of Kbytes allocated to data blocks
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of named
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.I files
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and, recursively, of files in named directories.
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It assumes storage is quantized in units of 1024 bytes (Kbytes) by default.
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Other values can be set by the
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.B -b
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option;
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.I size
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is the number of bytes, optionally suffixed
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.B k
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to specify multiplication by 1024.
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If
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.I file
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is missing,
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the current directory is used.
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The count for a directory includes the counts of the
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contained files and directories.
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.PP
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The
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.B -a
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option prints the number of blocks
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for every file in a directory.
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Normally counts are printed only for contained directories.
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.PP
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The
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.B -f
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option suppresses the printing of warning messages.
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.PP
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The
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.B -n
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option prints the size in bytes and the name of each file; it sets
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.BR -a .
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.PP
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The
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.B -t
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option prints, in the format of
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.B du
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.BR -n ,
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the modified time of
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each file rather than the size.
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If the options
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.B -tu
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are specified then the accessed time is printed.
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.PP
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The
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.B -q
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option prints, in the format of
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.B du
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.BR -n ,
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the QID path of
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each file rather than the size.
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.PP
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The
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.B -s
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option causes
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.I du
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to descend the hierarchy as always, but to print only a summary line
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for each
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.IR file .
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.PP
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The
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.B -e
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option causes
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.I du
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to print values (sizes, times or QID paths)
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in `scientific notation' via
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.IR print (2)'s
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.BR %g .
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.PP
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The
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.B -h
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option causes
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.I du
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to print values (sizes, times or QID paths)
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in scientific notation,
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scaled to less than 1024, and with a suitable SI prefix
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(e.g.,
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.L G
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for binary gigabytes).
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.PP
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The
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.B -p
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option causes
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.I du
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to print values (sizes, times or QID paths)
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in units of
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.IR SI-prefix .
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Case is ignored when looking up
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.IR SI-prefix .
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An empty
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.IR SI-prefix
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corresponds to a scale factor of 1 (e.g., print sizes in bytes).
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.\" .PP
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.\" The
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.\" .B -r
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.\" option causes
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.\" .I du
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.\" to read and discard every byte of every file encountered.
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.SH EXAMPLES
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Print the size of
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.L /tmp
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in fractional binary gigabytes:
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.IP
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.EX
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% du -sepg /tmp
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\&.6960154 /tmp
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.EE
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.LP
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Print the size of
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.L /tmp
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in bytes and in scientific notation:
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.IP
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.EX
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% du -sep '' /tmp
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7.473408e+08 /tmp
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.EE
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.SH SOURCE
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.B /sys/src/cmd/du.c
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