UNIX for Beginners Questions & Answers

Originally Posted by bakunin

Is the format of the lines fixed? (That is, will "{1:F" and "{2:I" always appear at a certain column?) If so, you won't even need to search for it.

First, you won't need grep because sed can do everything grep can do too:

Code:

sed -n '/{1:F/p' /your/file

If you need "{1:F" to appear on a certain column, modify the line like this:

Code:

sed -n '/^.\{xx\}{1:F/p' /your/file

where the red "xx" is a number representing the number of characters befor the search string.

In the same way you output the characters in question via a so-called "back-reference":

Code:

sed -n '/^.\{xx\}{1:F/ s/^\(.\{yy\}{2:I\)\(...\).*/\2/p;' /your/file

Again, enter sensible integer values for the "xx" and "yy" marked red.

I hope this helps.

bakunin

Originally Posted by Aia

 perl -nle '/\{2:I(\d{3})/ and print $1' mad_man.example

Originally Posted by RudiC

Try also

Code:

awk 'match ($0, /{1:F.*2:I.../) {print substr ($0, RSTART+RLENGTH-3,3)}' file
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Originally Posted by RavinderSingh13

Hello mad_man,

Could you please try following and let me know if this helps you.
Solution 1st:

Code:

awk '/1:F.*2:I/{sub(/.*2:I/,"");print substr($0,1,3)}'   Input_file

Solution 2nd:

Code:

awk '/1:F.*2:I/{print substr($0,index($0,"2:I")+3,3)}'   Input_file

Thanks,
R. Singh