bash scripting

brian0918 · 07-01-2003, 01:53 PM

How would you, for example, replace the number in the Nth column (columns are consecutive characters separated by blank space) of the line that contains "bleh" in the file called FILENAME with 12345?

Thanks.

david_ross · 07-01-2003, 02:22 PM

How about somehting like:

Code:

#!/bin/bash

for i in `cat file.txt`; do
   if [ `echo "$i" | grep bleh` ]; then
      echo $new
   else
      echo "$i"
   fi
done

I'm not too sure how you would be best to get the $new variable as I'm not sure what your line looks like from your description. You could probably use awk.

david_ross · 07-01-2003, 02:27 PM

Sorry - I should have said to change the file you will need to echo it into the file otherwise it will appear on the screen.