My example string is as follows This is 02G05 a test string 20-Jul-2012 Now from the above string I want to extract 02G05 For that I tried the following regex with sed echo This is 02G05 a test string 20-Jul-2012 sed -n d G d p But the above command prints nothing and the reason I believe is it is not able to match anything against the pattern I supplied to sed So my question is what am I doing wrong here and how to correct it When I try the above string and pattern with python I get my result gt gt gt re findall r d G d st 02G05 gt gt gt

How to extract text from a string using sed?

How about using grep -E?

echo "This is 02G05 a test string 20-Jul-2012" | grep -Eo '[0-9]+G[0-9]+'

~ Answered on 2012-07-19 20:42:43