=====unix Keyword 2=====
PATH environment variable

====Definition====
The $PATH variable specifies a list of one or more directory names separated by colons.

The /bin, /usr, and /local directories are typically included in most users' $PATH settings. The current directory is sometimes included, allowing programs in the current directory to be executed. Superuser (root) accounts as a rule are not include in $PATH, however, in order to prevent the accidental execution of scripts in the current directory.

When a command name is specified by the user or an exec call is made from a program, the system searches through $PATH, examining each directory from left to right in the list, looking for a filename that matches the command name. Once found, the program is executed as a child process of the command shell or program that issued the command.
====References====
http://en.wikipedia.org/wiki/PATH_%28variable%29

=====unix Keyword 2 Phase 2=====
quotes

====Definition====
A helpful tool that allows you to print characters just as you input them

====References====
List any sites, books, or sources utilized when researching information on this topic. (Remove any filler text).

  * Reference 1
  * Reference 2
  * Reference 3

====Demonstration====

<cli>
lab46:~$ dir -l | grep "d" | wc -l
19
lab46:~$ 
</cli>