UNIX for Dummies Questions & Answers

Code:

awk -v value="$value" 'NR==7{$0=$0" "value}1' input > /tmp/output
mv /tmp/output input

-v - define variable for awk
value=$value - value is a variable name which holds the value of $value. For understanding purpose, make it as v=$value # v is the variable which holds the value of $value

NR = give the number of records being processed.
NR==7 when awk reads the 7th line, we are changing the 7th line value as "7th line value + $value" and for printing all the lines i added 1 in the end. which is equivalent of {print}

Awesome man! Thanks!