This may be on the right track, but has a syntax error when I try to process
the three permutated IPv4 addresses:
time tr -sc 0-9\\n ' ' < CPV-GB-OneCol0-6192019.txt | awk '{ k = 0; for (i =
0; k < 4 && ++i CPV-GB-TwoCol-OutputY.txt
The awk command is intended to select the one combination of hostname and
permutated IPv4 address that correctly resolves.
The grep command { grep "Nmap scan report for " - | cut -c22- } should
remove all but the hostname and its IPv4 address
from the output of the earlier grep command { | grep '[0-9]$' >
intermediate.txt }.
The following attempt has no flagged errors, but stalls after creating
intermediate.txt:
time tr -sc 0-9\\n ' ' < CPV-GB-OneCol0-6192019.txt | awk '{ k = 0; for (i =
0; k < 4 && ++i