Question

The following works as expected.

awk -F'^' '{printf "set %s:%s %s\n",$1,$2, $7}' todel.txt | sed 's/$/\\r\\n/' >> tofile.txt

But when I try to add a variable to output as shown below, I get an error:

awk -F'^' '{printf "set %s:%s:%s %s\n",$1,$2,$myvar $7}' todel.txt | sed 's/$/\\r\\n/' >> tofile.txt

Answer 1

$myvar doesn’t expand in single quote.
You can use the -v option to pass shell variable to awk:

awk -F'^' -v myvar=$myvar '{printf "set %s:%s:%s %s\n",$1,$2,myvar,$7}' todel.txt