以下是參數說明:
Usage: sort [OPTION]... [FILE]...
Write sorted concatenation of all FILE(s) to standard output.
+POS1 [-POS2] start a key at POS1, end it *before* POS2 (obsolescent)
field numbers and character offsets are numbered
starting with zero (contrast with the -k option)
-b ignore leading blanks in sort fields or keys
-c check if given files already sorted, do not sort
-d consider only [a-zA-Z0-9 ] characters in keys
-f fold lower case to upper case characters in keys
-g compare according to general numerical value, imply -b
-i consider only [\040-\0176] characters in keys
-k POS1[,POS2] start a key at POS1, end it *at* POS2
field numbers and character offsets are numbered
starting with one (contrast with zero-based +POS form)
-m merge already sorted files, do not sort
-M compare (unknown) < `JAN' < ... < `DEC', imply -b -n compare according to string numerical value, imply -b
-o FILE write result on FILE instead of standard output
-r reverse the result of comparisons
-s stabilize sort by disabling last resort comparison
-t SEP use SEParator instead of non- to whitespace transition
-T DIRECTORY use DIRECTORY for temporary files, not $TMPDIR or /tmp
-u with -c, check for strict ordering;
with -m, only output the first of an equal sequence
-z end lines with 0 byte, not newline, for find -print0
--help display this help and exit
--version output version information and exit
POS is F[.C][OPTS], where F is the field number and C the character position
in the field, both counted from one with -k, from zero with the obsolescent
form. OPTS is made up of one or more of Mbdfinr; this effectively disables
global -Mbdfinr settings for that key. If no key is given, use the entire
line as the key. With no FILE, or when FILE is -, read standard input.