Linus Torvalds creator of the Linux Kernel.
URL: http://www.cs.helsinki.fi/~torvalds
One Day One Command
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aspell — Spell Checker
Summary:
Aspell can either be used as a library or as an independent spell
checker. Its main feature is suggesting possible replacements for a
misspelled word. Aspell can also easily check documents in UTF-8
without having to use a special dictionary.
Examples:
$ aspell — Show Help/Usage message.
$ aspell conf — Show ASpell configuration details.
$ aspell -l — Start typing some words and Press Ctrl+D then aspell
list all misspelled words from that text.
$ aspell -c MyFile — Run Spell checker over MyFile and Give a list of
replacement work for the misspelled words.
Read: man aspell or /usr/share/doc/aspell-xyz/