stabilize sort by disabling last-resort comparison
use SIZE for main memory buffer
-t, --field-separator=SEP use SEP instead of non-blank to blank transition
use DIR for temporaries, not $TMPDIR or /tmp; multiple options specify multiple directories
with -c, check for strict ordering; without -c, output only the first of an equal run
end lines with 0 byte, not newline
display this help and exit
output version information and exit
POS is F[.C][OPTS], where F is the field number and C the character position in the field. OPTS is one or more single-letter ordering options, which override global ordering options for that key. If no key is given, use the entire line as the key.
SIZE may be followed by the following multiplicative suffixes: % 1% of memory, b 1, K 1024 (default), and so on for M, G, T, P, E, Z, Y.
With no FILE, or when FILE is -, read standard input.
*** WARNING *** The locale specified by the environment affects sort order. Set LC_ALL=C to get the traditional sort order that uses native byte values.