Searching and replacing string

[Jose Mosquera]

Hi pals,

I need search for the string 03 placed into 6th and 7th columns of the each line of a file. No all lines of the files have this condition. All lines of file must be displayed, changing just all the lines that fulfill the previous condition. Please use commands "sed" or "awk", omit perl.

Rgds

[James R. Ferguson · Accepted solution]

Hi:

# sed -e 's/\(^.\{5\}\)03/\1xx/' file

...for example, substitutes "xx" for "03" if "03" is in positions 6-7, one relative.

Regards!

...JRF...

[Jose Mosquera]

James, you got it!

Thank you very much.