Echo command in rails

Hi,

I am following the instructions given in the link

http://mutoumahendra.blogspot.com/2010/07/tinymceplugins-spellchecker-on-rails.html
for doing spell check.

The problem I am facing here is, I am not able to run

echo "#{spell_check_text}" | aspell -a -l #{lang} command .
When I execute the method the above command is returning blank.

My question is How to run echo “statement” in rails.

In command prompt I am able to run the echo using exec
exec ‘echo “#{spell_check_text}” | aspell -a -l #{lang}’.

Cheers,
Rana.

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