|-B||Specify directories to search for binaries. Requires the -f option.|
|-M||Specify directories to search for manual pages. Requires the -f option.|
|-S||Specify directories to search for program sources. Requires the -f option.|
|-a||Report all matches instead of only the first of each requested type.|
|-b||Search for binaries.|
|-f||Delimits the list of directories after the -B , -M , or -S options, and indicates the beginning of the program list.|
|-m||Search for manual pages.|
|-q||("quiet"). Suppress the output of the utility name in front of the normal output line. This can become handy for use in a backquote substitution of a shell command line, see EXAMPLES.|
|-s||Search for source directories.|
|-u||Search for "unusual" entries. A file is said to be unusual if it does not have at least one entry of each requested type. Only the name of the unusual entry is printed.|
|-x||Do not use "expensive" tools when searching for source directories. Normally, after unsuccessfully searching all the first-level subdirectories of the source directory list, whereis will ask locate(1) to find the entry on its behalf. Since this can take much longer, it can be turned off with -x .|
The following finds all utilities under /usr/bin that do not have documentation:
whereis -m -u /usr/bin/*
Change to the source code directory of ls(1):
cd whereis -sq ls
The whereis utility appeared in BSD 3.0 . This version re-implements the historical functionality that was lost in BSD 4.4 .
This implementation of the whereis command was written by
.An Jrg Wunsch .
This re-implementation of the whereis utility is not bug-for-bug compatible with historical versions. It is believed to be compatible with the version that was shipping with
.Fx 2.2 through
.Fx 4.5 though.
The whereis utility can report some unrelated source entries when the -a option is specified.