Shell Programming and Scripting

HI everyone

I looking for help to use sed.

I have 82 files. In each file I need to replace a word by another. All files are on the same directory.all files are texte files.

I need to keep the same file name for all file that will be modified.

Here is an exemple :

file name :
saturne_titan_20080609.txt
saturne_titan_20080709.txt ..etc

Files look like this inside :
cactus_sun_20080609.DIMG
cactus_sun_20080609.DIMG

I did try to replace the word cactus on this way

but like this I have to work file by file like :

and then delete the saturne_titan_20080609.txt and rename the saturne_titan_20080609_new.txt to saturne_titan_20080609.txt.

I am looking for an easy way to do everything in one command line. If possible

Thanks a lot if you can help me on this

Code:

for file in `find . -name "saturne_titan_*.txt" -type f`
do
        sed "s/cactus/catusv2/g" $file > temp; mv temp $file;
done

please test first.

Code:

#!/bin/ksh

for i in saturne_*.txt
do
  printf '%s/cactus/catusv2/g\n.\nwq!\n' | ex - ${i} 
done

Dear anchal_khare

Your command line is working great. But the shell prompt me to :

I had to respond "yes".

Do you now a way on the command line to respond yes automatically ? or to prompt off this question ?

Thanks all for your help. Your so SUPER

use "mv -f" instead of "mv"

Dear vgersh99,

I try to script but it gave me an error :

I belivied that this is my fault has I have simplfied my request. I forgot to tell you that :

Inside of each file I found that some entries will not be modified as I do not need to :

here is what I mean : example of

saturne_titan_20080609.txt

Inside of this one we have :

TA_CLIR.DAT_RAP_20080609
cactus_sun_20080609.DIMG
cactus_sun_20080609.DIMG

each 82 files have this kind of exception entries. I have to say sorry for this.

Do you mind to help me with your script to make it work ? Thanks.

sorry.

Code:

#!/bin/ksh

for i in saturne_*.txt
do
  printf '1,$s/cactus/catusv2/g\n.\nwq!\n' | ex - ${i} 
done