Backtracking to find a less error-prone script-creation process:
Step (1): Apply Magic Banana's one-line processor to the single-column
Hostname_List containing all the Webalizer
records for a time period:
tr -sc 0-9\\n ' ' < hostname_list | awk '{ k = 0; for (i = 0; k < 4 && ++i
Two-Col-Output-Sorted.txt
Where it will be clear that many bare IPv4 addresses are duplicated, along
with many resolved hostnames, but there will
be unintended bystanders that have legitimate IPv4 addresses but are absent
from the original hostname_list that are not
duplicated, along with bare IPv4 addresses that weren't resolved with nMap
and also aren't duplicated.
Step (4) Select the properly resolved outputs from the sorted output file:
I tried selecting just the duplicated rows of the sorted output file, but
that discarded legitimately resolved hostnames
along with the inadvertent bystanders, so the sorted hostname_list file has
to be compared to the sorted output file in
order to retain all the properly resolved input hostnames. This can be done
with LibreOffice Calc, but that would be
considered "off-script" in the present discussion.
Hostnames that haven't been resolved with the main script have to be included
and resolved by using other search methods,
such as Google and Hurricane Electric.
Steps (1 -3) can be concatenated:
time tr -sc 0-9\\n ' ' < CPV-GB-OneCol0-6192019.txt | awk '{ k = 0; for (i =
0; k < 4 && ++i CPV-NSL-Supplemental-Output-Sorted.txt
Lots of post-processing to be done.
