this website for understanding Linux commands you paste in is so good https://explainshell.com/explain?cmd=nmap+-vvv+-sS+-p+1-65535+--max-retries%3D1+-oN+TARGET.txt+IP
explainshell.com - nmap -vvv -sS -p 1-65535 --max-retries=1 -oN TARGET.txt IP

@SwiftOnSecurity It's good though limited.

The first example on explainshell.com correctly explains :(){ :|:& };: but doesn't tell you what you need to know (it's a fork bomb). It also can't explain awk or sed commands 😞