Shell Programming and Scripting

hi,
I'm trying to add a # to the beginning of the line where the a word is included.

and the i want to run the whole original script.

and if possible I would prefer that line would stay in the same order in the text file, the line which includes the word.

Thanks,

sed 's/.*word/#&/'

Thank you,

I am really new at shell scripting.

However I have a little problem when I do this.

Lets say that my original script is as follows;

#!/bin/ksh
echo "a"
echo "b"
echo "c"


and the update script;

#!/bin/ksh
sed 's/.*b/#&/' original.sh
./original.sh


the result i obtain is as follows;

#!/bin/ksh
echo "a"
#echo"b"
echo "c"


and the original.sh is not updated

how can i update original.sh or how can i see the output as;

a
c

If you only see the updated result on your screen (std out) then try this:

Code:

sed 's/.*b/#&/' original.sh > temprorary.sh
mv temprorary.sh original.sh

mv original.sh old.sh
sed 's/.*b/#&/' old.sh >original.sh
chmod 755 original.sh

Thank you so much..

You need the mode to make it actually executable, along with the #! first line.