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Thank you for the detailed explanation.Now I understand what it is..
I did not want to use tmp files hence used this approach..

Thanks again

Thank you for the replies.

I was able to write to the first line using the following command:
echo "1i\nthis is the line that u wanted to insert \n.\nwq" | ex -s filename


But could not...

I was trying to find out the easiest way to write new line to the beginning of an exisiting file.
I am using KSH.

Thank you for the reply.
I do not have permissions to create temp tables :-(

ALL,

My shell script takes a employee file as input.
I have to identify the list of employees not in the input file and update their status in the database.

Approach I followed:
by...