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Full Discussion: Bash : Why are spaces important here ?
Top Forums Shell Programming and Scripting Bash : Why are spaces important here ? Post 302932299 by cfajohnson on Tuesday 20th of January 2015 01:13:18 PM
Old 01-20-2015
Quote:
Originally Posted by Corona688
Code:
$ whereis [

[: /usr/bin/[
$

It's usually a built-in as well, but the command must exist. The shell must treat it as a command.

Rather than whereis, use type; It tells you what the shell will actually use:

Code:
$ type [
[ is a shell builtin

With the -a option, it gives all the possible commands that could be executed:

Code:
$ type -a [
[ is a shell builtin
[ is /usr/bin/[

[ is also a synonym for test.
These 4 Users Gave Thanks to cfajohnson For This Post:
balajesuri John K migurus Scrutinizer
 

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LEARN ABOUT ULTRIX

whereis

whereis(1)						      General Commands Manual							whereis(1)

Name
       whereis - locate source, binary, and or manual for program

Syntax
       whereis [-sbm] [-u] [-SBM dir... -f] name...

Description
       The command locates source/binary and manuals sections for specified files.  The supplied names are first stripped of leading pathname com-
       ponents 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.  The command then attempts to locate the desired program in a list of standard places.

Options
       -S dir
	  Search for source files in specified directory.

       -B dir
	  Search for binary files in given directory.

       -M dir
	  Search for manual section files in given directory.

       -b Searches only for binary files.

       -f Terminates last directory list created from use of -S, -B or -M flags and signals the start of file names.

       -m Searches only for manual section files.

       -s Searches only for source files.

       -u Searches for files that do not have one of binary, source or manual section files.  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.

Examples
       The following finds all the files in which are not documented in with source in
       cd /usr/ucb
       whereis -u -M /usr/man/man1 -S /usr/src/cmd -f *

Restrictions
       Since the program uses to run faster, pathnames given with the -M -S and -B must be full.  That is, they must begin with a ``/''.

Files
       /usr/src/*
       /usr/{doc,man}/*
       /lib, /etc, /usr/{lib,bin,ucb,old,new,local}

																	whereis(1)
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