whereis utility checks the standard
binary directories for the specified name, printing
out the paths of any it finds that are executable by the user.
The path searched is:
-a flag is given,
whereis will return a list of all matches instead of
just the first match.
whereis utility exits with one of the
- All names were successfully resolved.
- Some names were resolved but not all.
- No names were resolved.
apropos(1), find(1), locate(1), which(1)
whereis command first appeared in
2BSD, but the original version was legally tainted
and was not included as part of the 4.4BSD release,
such that most of the original functionality was lost.
-a option first appeared in
The original version was written by Bill Joy.