echo(1) %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 
display a line of text
 
Echo the STRING(s) to standard output.
source manpages: echo