for i in {1.1.1.1, 2.2.2.2, 3.3.3.3, 4.4.4.4, 5.5.5.5, 6.6.6.6, 7.7.7.7, 8.8.8.8}; do nc -zvn $i 443 -w 1; done
for i in 1.1.1.1 2.2.2.2 3.3.3.3 4.4.4.4 5.5.5.5 6.6.6.6 7.7.7.7 8.8.8.8 ; do nc -zvn $i 443 -w 1; done
Source: https://www.malekal.com/faire-boucle-for-while-bash-linux-exemples/