Shell Programming and Scripting

Well, you can first add 20 spaces at the end of each line (assuming that all the lines are of fixed length of 280 chars each) and then use your sed command to add the text at the end of the line. That would work I guess.

Code:

awk '{printf "%-300sWelcome to UNIX\n",$0}' urfile

Thanks for your reply .

But I am looking for something like this :

Code:

sed "s/.\{300\}/$var1$var2/g" $FILE

this code is giving error.

I wonder what should be the correct code.

I want to append data at character position 300 when my file is having data at character position lesser than 300.

Any suggestions...

Code:

while read -r line
do
 case "${#line}" in
    [012][0-9][0-9] | [0-9][0-9] | [0-9] ) echo "${line}new characters...";;
    * )echo "${line}";;
 esac 
done <"file"

Hi
I couldn't get what are we doing here ???

What error are you getting?

Function : sed "s/.\{300\}/100200/g" cannot be parsed.

Is it anyway related to the fact that I want to append data at character position 300 when my file is having data at character position lesser than 300.

I mean last character in every line in my file is @ character position less than 300 and I am appending new data @ char position 300 onwards...