UNIX files are created by text editors or by computer programs
like word processors, drawing programs, or spread sheets. In the
next chapter a popular text editor called Emacs is described.
This will be used to create files.
Most people find it useful to sort their files into categories,
and to create a directory for each category. In the above example,
Joe has a directory called thesis which contains all the
information related to his thesis. In order to create a new directory,
use the mkdir <directory-name> command.
This will create what is commonly referred to as a subdirectory,
meaning that this directory will exist below your current working
directory in the file system tree. For example, to create a directory
called lettters use:
math joe % mkdir letters
Tim Kohl
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