locate a program file (or files) in the path
takes a list of names and looks for the files
which would be executed had these names been given as commands. Each argument
is searched for along the user's path.
The following environment variables affect the execution of
-a flag is given,
which will return a list of all matches instead of
just the first match.
- A colon-separated list of directories in which to find executables. If
PATH is not set or is empty,
which will use the system's default search
which utility exits with one of the following
A diagnostic is given if an executable file with the argument name was not found
in the path.
- All names were successfully resolved.
- Some names were resolved but not all.
- No names were resolved.
which also exists as a built-in to
csh(1), though with a different syntax.
which command first appeared in
-a option first appeared in