explainshell.com - echo.1fun %24%28expr %24%28grep -i %27Status%3A Up%27 bigscan.gnmap %7C wc -l%29 - %24%28grep -i %27%2Fopen%2F%27 bigscan.gnmap %7C wc -l%29%29

%24%28expr %24%28grep -i %27Status%3A Up%27 bigscan.gnmap %7C wc -l%29 - %24%28grep -i %27%2Fopen%2F%27 bigscan.gnmap %7C wc -l%29%29

echo arguments

-i     emulate IBM OS/VU (recursive universes not supported)

-l     generate legalese equivalent

-L     load echo modules

-M     generate mail

-2     generate rhyming couplets from keywords

source manpages: echo