GREAT: find / -type f -print0 |xargs -0 grep heythere
I tried some sub-shells, and seemed to not work so well. $() and `` would be nice.
ps -fp $(pgrep -d, krb5kdc)
ps -fp `pgrep -d, krb5kdc`
http://explainshell.com/explain?cmd=ps+-fp+%24%28pgrep+-d%2C...
edit: newlines