I am running a loop like so:

for i in $(cat ips_uniq.txt)
do 
    whois $i | grep 'netname|country|org-name' | sed ':a;N;$!ba;s/\\n//g'
done

Output:

netname:        NETPLUScountry:        INcountry:        INcountry:        IN

netname:        NETPLUScountry:        INcountry:        INcountry:        IN

This is good however my ips_uniq.txt contains over 300 uniq IP addresses so Ideally I want the IP address to be on the same line of each output.

CodePudding user response：

My version:

#!/bin/bash

while IFS= read -r i
do
    if [[ "$i" != "" ]]
    then
        results=$(whois "$i" | grep -iE 'netname|country|org-name' | tr '\n' ' ')
        echo "$i $results"
    fi
done < ips_uniq.txt

• using the while read method is a safe way to read files line per line, avoiding all problems with spaces or weird line formats. Read https://mywiki.wooledge.org/BashFAQ/001 for details. Not required in your case, but a good construct to learn about.
• the if is to avoid empty lines.
• then store the result of the whois | grep combination in a variable.
• note that I replaced your sed with a simple tr which removes the \n, and adds a space to split fields. Modify as required.
• then the final echo adds the IP address prefix to the results line.

I tested with ips_uniq.txt equal to

8.8.8.8

74.6.231.20

and the result is

8.8.8.8 NetName:        LVLT-ORG-8-8 Country:        US NetName:        LVLT-GOGL-8-8-8 Country:        US 
74.6.231.20 NetName:        INKTOMI-BLK-6 Country:        US 

Using printf you could format the output to be better (i.e. fixed length columns for example).