I am new to Unix. I got a question.
Suppose I have a command can run like this /sbin/abc but cannot run abc.
How can I set certain path or something that make abc can run everywhere?
I am using a default installation of FreeBSD, with the C shell (csh).

echo $SHELLto find out which shell you're using. – Tim Dec 22 '10 at 7:08