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Need help with scripting mass file edits..

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# 1  
Old 08-14-2007
Need help with scripting mass file edits..
Hello,

I am wanting to know a way to shell (ksh)script-edit a file by having a script that searches for a specific string, and then input lines of text in the file after that specific string. Please help, as I will be up all night if I can't figure this out.
Last edited by LinuxRacr; 08-14-2007 at 07:45 PM..
# 2  
Old 08-14-2007
You could do it by using read to read each line, grep to search for the string

eg

Code:
while read N
do
       echo "$N" | grep $STRING
       if test "$?" = "0"
       then
             echo new line
             echo new line
       fi
       echo $N
done

# 3  
Old 08-14-2007
You can also try sed

place all the replace instances in a file ( sed_file) with entries
s/[search string1]/[replace string1]/g
s/[search string2]/[replace string2]/g

Then to make the replacements do as :

$ sed -f sed_file [input file]
# 4  
Old 08-14-2007
Perhaps I should have stated that I wanted to input lines of text after the string that is being searched out. I have to do this on 398 servers tonight. Please help!
# 5  
Old 08-14-2007
Code:
while read N
do
       echo "$N" | grep $STRING
       if test "$?" = "0"
       then
             echo $N
             echo new line
             echo new line
       else
            echo $N
       fi
done

How did you end up with this job?
# 6  
Old 08-14-2007
LOL! Long story...

Thanks for the responses everyone. It was a last minute thing my mngr gave me. I have to add lines to the sudoers file on 398 servers, and I want to keep the file tidy, and not just append everything to the end.
# 7  
Old 08-14-2007
What's the problem with the SED script. can u give a small example for the illustration of the problem.

Abhi.
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