.CD "whereis \(en examine system directories for a given file" .SX "whereis \fIfile" .FL "\fR(none)" .EY "whereis stat.h" "Prints: \fI/usr/include/sys/stat.h\fR" .PP \fIWhereis\fR searches a fixed set of system directories, \fI/bin\fR, \fI/lib\fR, \fI/usr/bin\fR, and others, and prints all occurrences of the argument name in any of them.