Problem in making a script

[amritpal pathak]

   Thank you very much .
                                            it is working now.it is
replacing the user's input with line number 4's content in abc file but it
also removes the contents which are after the line number 4 i.e 5,6,7 so
on.everyline gets remove.
It is not feasible

Why?

TEMP=$(mktemp)
head -n $((4 - 1)) "abc.tex" > "$TEMP"
echo "$fname" >> "$TEMP"
LEN=$(cat "abc.tex"|wc -l)
tail -n $(($LEN - 4)) "abc" >> "$TEMP"
mv "$TEMP" "abc.tex"

amritpalpathakgne.wordpress.com
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