Bash Scripting Help

[Bryce C]

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Hello all. I was wondering if anyone knew how to do an if statement in
bash to see if results were returned?  I want to write a bash script to
run hourly that will grep my mailbox for a certain text if the results
are different than the contents of another, previous output, then runn
another command.  Somethinng like:

cat file|grep Text>/tmp/NewText.grep
diff /tmp/NewText.grep /tmp/Text.grep
if( diff returned anything ) ./runme
mv /tmp/NewText.grep /tmp/Text.grep

I just don't know what if switches are available (to use) in bash.
Thank you.

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Bryce C <Plug@BryceCo.Net>
CoBryce Communications

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