Grep in a variable

Posted by Ashfame on Ask Ubuntu See other posts from Ask Ubuntu or by Ashfame
Published on 2011-02-10T14:38:03Z Indexed on 2011/02/10 15:33 UTC
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grep

How to do a grep in a variable? I have stored the wget output in a variable and I need to extract out some strings from it. Like the content of the variable is upgrade http://wordpress.org/download/ http://wordpress.org/wordpress-3.0.5.zip 3.0.5 en_US 4.3 4.1.2

I need to check if the string contains the word upgrade, so I can do a simple grep and then check the exit status of it by $? and proceed. But how can I get the value 3.0.5 which is actually the fourth word? And how to actually grep in a variable?

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