| -b |
ignore leading blanks
|
| -d |
consider only blanks and alphanumeric characters
|
| -f |
fold lower case to upper case characters
|
| -g |
compare according to general numerical value
|
| -i |
consider only printable characters
|
| -M |
compare (unknown) < 'JAN' < ... < 'DEC'
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| -h |
compare human readable numbers (e.g., 2K 1G)
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| -n |
compare according to string numerical value
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| -R |
shuffle, but group identical keys. See shuf(1)
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| -r |
reverse the result of comparisons
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| -V |
natural sort of (version) numbers within text
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| -c |
check for sorted input; do not sort
|
| -k KEYDEF |
sort via a key; KEYDEF gives location and type
KEYDEF ⇒ F[.C][OPTS][,F[.C][OPTS]]
F : field number
C : character position in the field
OPTS : [bdfgiMhnRrV] - one or more single-letter ordering options
|
| -m |
merge already sorted files; do not sort
|
| -o FILE |
write result to FILE instead of standard output
|
| -S SIZE |
use SIZE for main memory buffer
|
| -t SEP |
use SEP instead of non-blank to blank transition
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| -T DIR |
use DIR for temporaries, not $TMPDIR or /tmp
multiple options specify multiple directories
|
| -u |
with -c, check for strict ordering
without -c, output only the first of an equal run
|
| -z |
with -c, check for strict ordering
without -c, output only the first of an equal run
|