One Liners Mostly i use

one liners

cat asset-domains.txt | while read line; do echo $line; done

cat asset-domains.txt | while read x; do nmap -Pn $(dig +short $x | head -n1); done 
cat asset-domains.txt | while read x; do <perform any function like nmap OR directory brutE OR recursive subdomains , sub bruteforc>; done 

#echo xyz.google.com | rev | awk -F'.' '{print $1\.$2\.$3}' | rev