awk < IPv4.txt '{ print $2"\t"}' -
with
cut -f 2 IPv4.txtThat will make no difference, except that if anybody (including yourself) gets back to the command, (s)he will more easily understand it is simply selecting the second column.
awk < IPv4.txt '{ print $2"\t"}' -
with
cut -f 2 IPv4.txtThat will make no difference, except that if anybody (including yourself) gets back to the command, (s)he will more easily understand it is simply selecting the second column.