/usr/bin/hunspell

Usage: hunspell [OPTION]... [FILE]...
Check spelling of each FILE. Without FILE, check standard input.

  -1		check only first field in lines (delimiter = tabulator)
  -a		Ispell's pipe interface
  --check-url	check URLs, e-mail addresses and directory paths
  --check-apostrophe	check Unicode typographic apostrophe
  -d d[,d2,...]	use d (d2 etc.) dictionaries
  -D		show available dictionaries
  -G		print only correct words or lines
  -h, --help	display this help and exit
  -H		HTML input file format
  -i enc	input encoding
  -l		print misspelled words
  -L		print lines with misspelled words
  -m 		analyze the words of the input text
  -n		nroff/troff input file format
  -O		OpenDocument (ODF or Flat ODF) input file format
  -p dict	set dict custom dictionary
  --no-default-personal
		don't use the default personal dictionary
  -r		warn of the potential mistakes (rare words)
  -P password	set password for encrypted dictionaries
  -s 		stem the words of the input text
  -S 		suffix words of the input text
  -t		TeX/LaTeX input file format
  --trace	report how each input word was decided
  -u		print the line number, misspelled word and first suggestion
  -U		print the input text with each misspelled word replaced by its
		first suggestion
  -u2		print the replacements that -U would make, as a sed script
  -u3		print the file name and line number with each misspelled word
  -v, --version	print version number
  -vv		print Ispell compatible version number
  -w		print misspelled words (= lines) from one word/line input.
  -X		XML input file format

Example: hunspell -d en_US file.txt    # interactive spelling
         hunspell -i utf-8 file.txt    # check UTF-8 encoded file
         hunspell -l *.odt             # print misspelled words of ODF files

         # Quick fix of ODF documents by personal dictionary creation

         # 1 Make a reduced list from misspelled and unknown words:

         hunspell -l *.odt | sort | uniq >words

         # 2 Delete misspelled words of the file by a text editor.
         # 3 Use this personal dictionary to fix the deleted words:

         hunspell -p words *.odt

Bug reports: http://hunspell.github.io/