Use “echo” to identify the search path for the executable files that I’m using. For example, my “ping” utility is coming from /usr/sbin/ping:

[gmcmillan@suncs9 ~]% which ping /usr/sbin/ping [gmcmillan@suncs9 ~]% echo $path /home/gmcmillan/bin /tools/pkgs/framemaker/6.0/bin /tools/bin /tools/share/cad/bin /usr/dt/bin /usr/openwin/bin /usr/ucb /bin /usr/bin /usr/ccs/bin /tools/pkgs/syscad /sbin /usr/sbin [gmcmillan@suncs9 ~]%