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Use the command ispell <filename> to run an interactive spelling checker on a file.
The command spell is a non-interactive spelling checker. It just prints out all misspelled words from the input file of words. Hence if you check a file with spell and there is no output, then no spelling mistakes were found in the given file. No news is good news!
Both spell and ispell use a dictionary that is located in the file /usr/share/dict/words. Here is an example using spell.
[alice@localhost simple]: cat test1 dada dad mom father sun simpel [alice@localhost simple]: spell test1 dada simpel [alice@localhost simple]:
The spell program by itself is not very useful. However it is useful if used from inside shell scripts. More about shell scripts in Chapter 6.