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Full Discussion: PATH problem
Top Forums UNIX for Beginners Questions & Answers PATH problem Post 303024402 by apmcd47 on Monday 8th of October 2018 04:50:18 AM
Old 10-08-2018
Most Unix and Linux systems have a /usr/local directory, which contains bin, sbin, etc and man directories, into which you can add your own programs and associated configuration files and man pages, without worry about being overwritten by updates to the OS.

On my Ubuntu system these are also included in the ENV_PATH and ENV_SUPATH variables mentioned in post 2.

I understand that a newcomer to Linux may not be aware of the significance of this directory, causing them to re-invent the wheel, but unless you have a very good reason for using /mybin I would urge you to move everything into /usr/local/bin.

Andrew
 

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LEARN ABOUT OPENSOLARIS

whereis

whereis(1B)					     SunOS/BSD Compatibility Package Commands					       whereis(1B)

NAME

       whereis - locate the binary, source, and manual page files for a command

SYNOPSIS

       /usr/ucb/whereis [-bmsu] [-BMS directory... -f] filename...

DESCRIPTION

       The  whereis utility locates source/binary and manuals sections for specified files. The supplied names are first stripped of leading path-
       name 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 places:

	 etc
	 /sbin
	 /usr/bin
	 /usr/ccs/bin
	 /usr/ccs/lib
	 /usr/lang
	 /usr/lbin
	 /usr/lib
	 /usr/sbin
	 /usr/ucb
	 /usr/ucblib
	 /usr/ucbinclude
	 /usr/games
	 /usr/local
	 /usr/local/bin
	 /usr/new
	 /usr/old
	 /usr/hosts
	 /usr/include
	 /usr/etc

OPTIONS

       The following options are supported:

       -b    Searches only for binaries.

       -B    Changes or otherwise limits the places where whereis searches for binaries.

       -f    Terminates  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.

       -m    Searches only for manual sections.

       -M    Changes or otherwise limits the places where whereis searches for manual sections.

       -s    Searches only for sources.

       -S    Changes or otherwise limit the places where whereis searches for sources.

       -u    Searches 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.

EXAMPLES

       Example 1 Finding files

       Find all files in /usr/bin which are not documented in /usr/share/man/man1 with source in /usr/src/cmd:

	 example% cd /usr/ucb
	 example% whereis -u -M /usr/share/man/man1 -S /usr/src/cmd -f *

FILES

	   o	  /usr/src/*

	   o	  /usr/{doc,man}/*

	   o	  /etc, /usr/{lib,bin,ucb,old,new,local}

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       chdir(2), attributes(5)

BUGS

       Since whereis uses chdir(2) to run faster, pathnames given with the -M, -S, or -B must be full; that is, they must begin with a `/'.

SunOS 5.11							    10 Jan 2000 						       whereis(1B)
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