-b, --ignore-leading-blanks
       ignore leading blanks

-d, --dictionary-order
       consider only blanks and alphanumeric characters

-f, --ignore-case
       fold lower case to upper case characters

-g, --general-numeric-sort
       compare according to general numerical value

-i, --ignore-nonprinting
       consider only printable characters

-M, --month-sort
       compare (unknown) < `JAN' < ... < `DEC'

-h, --human-numeric-sort
       compare human readable numbers (e.g., 2K 1G)

-n, --numeric-sort
       compare according to string numerical value

-R, --random-sort
       sort by random hash of keys

--random-source=FILE
       get random bytes from FILE

-r, --reverse
       reverse the result of comparisons

--sort=WORD
       sort  according  to  WORD:  general-numeric -g, human-numeric -h, month -M, numeric -n, random -R,
       version -V

-V, --version-sort
       natural sort of (version) numbers within text

Other options:

--batch-size=NMERGE
       merge at most NMERGE inputs at once; for more use temp files

-c, --check, --check=diagnose-first
       check for sorted input; do not sort

-C, --check=quiet, --check=silent
       like -c, but do not report first bad line

--compress-program=PROG
       compress temporaries with PROG; decompress them with PROG -d

--debug
       annotate the part of the line used to sort, and warn about questionable usage to stderr

--files0-from=F
       read input from the files specified by NUL-terminated names in file F; If F is - then  read  names
       from standard input

-k, --key=POS1[,POS2]
       start a key at POS1 (origin 1), end it at POS2 (default end of line).  See POS syntax below

-m, --merge
       merge already sorted files; do not sort

-o, --output=FILE
       write result to FILE instead of standard output

-s, --stable
       stabilize sort by disabling last-resort comparison

-S, --buffer-size=SIZE
       use SIZE for main memory buffer

-t, --field-separator=SEP
       use SEP instead of non-blank to blank transition

-T, --temporary-directory=DIR
       use DIR for temporaries, not $TMPDIR or /tmp; multiple options specify multiple directories

--parallel=N
       change the number of sorts run concurrently to N

-u, --unique
       with -c, check for strict ordering; without -c, output only the first of an equal run

-z, --zero-terminated
       end lines with 0 byte, not newline

--help display this help and exit

--version
       output version information and exit