echo 'printf "192.0.2.%d\n" $((RANDOM %256))' >> ip4temp1
echo 'printf "198.51.100.%d\n" $((RANDOM %256))' >> ip4temp1
echo 'printf "203.0.113.%d\n" $((RANDOM %256))' >> ip4temp1
shuf ip4temp1 -n 1 > ip4temp2
source ip4temp2
rm ip4temp1
rm ip4temp2