On Tue, Aug 18, 2009 at 06:41:30AM -0700, Yong Huang wrote: > > Or, maybe less expensive: > > > > if [ \( -d /etc \) -a \( -d /home \) ]; then echo "Yes."; fi > Can you explain why it's less expensive? When you use a bracket, you're spawning a subshell. Cheers, -- Dave Ihnat dihnat at dminet.com