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print only matched string instead lines in grep

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# 1  
Old 02-18-2009
print only matched string instead lines in grep
frnd,
Is there any way to print only the string that matched the pattern instead printing the whole line?

thanks in advance.
# 2  
Old 02-18-2009
Quote:
Originally Posted by anchal_khare
frnd,
Is there any way to print only the string that matched the pattern instead printing the whole line?

With GNU grep:

Code:
grep -o STRING file ...

With sed:

Code:
sed -n '/STRING/ s/.*\(STRING\).*/\1/p'

# 3  
Old 02-18-2009
hi cfajohnson..

very thanks.
but my pattern is a regex.
in that case?
# 4  
Old 02-18-2009

Replace STRING with your regex.
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