whereis — locate the binary, source, and manual page files for a command
whereis [−bmsu] [ −BMS directory... −f ] filename...
whereis
locates source/binary and manuals sections for specified
files. The supplied names are first stripped of leading
pathname components and any (single) trailing extension of
the form .ext, for
example, .c.
Prefixes of s.
resulting from use of source code control are also dealt
with. whereis
then attempts to locate the desired program in a list of
standard Linux places.
−bSearch only for binaries.
−mSearch only for manual sections.
−sSearch only for sources.
−uSearch for unusual entries. A file is said to be unusual if it does not have one entry of each requested type. Thus `whereis −m −u *' asks for those files in the current directory which have no documentation.
−BChange or otherwise limit the places where whereis searches for binaries.
−MChange or otherwise limit the places where whereis searches for manual sections.
−SChange or otherwise limit the places where whereis searches for sources.
−fTerminate the last directory list and signals the
start of file names, and must be used when any
of the −B,
−M, or −S options are used.
Find all files in /usr/bin
which are not documented in /usr/man/man1 with source in /usr/src:
example% cd /usr/bin example% whereis −u −M /usr/man/man1 −S /usr/src −f *
/{bin,sbin,etc}/usr/{lib,bin,old,new,local,games,include,etc,src,man,sbin,X386,TeX,g++-include}
/usr/local/{X386,TeX,X11,include,lib,man,etc,bin,games,emacs}Since whereis uses chdir(2V) to run faster,
pathnames given with the −M, −S, or −B must be full; that is, they must
begin with a `/.'
whereis has a hard-coded path, so may not always find what you're looking for.
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