EECS 1012 Lecture Notes - Lecture 6: Working Directory
13 Jun 2018
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EECS 1012 Lecture 6 Notes
Introduction
Initial working directory
• Each user is assigned a tree branch that can be expanded below that subdirectory and a
starting point, known as the initial working directory.
• On a single-user system, the initial working directory is established by the system.
• In Windows, it is C:\Users\yourusername.
• In the Macintosh, it is a subdirectory just below the root called the desktop.
• From the current directory, the user can access files anywhere in the system.
• The file name or new working directory can be specified relative to the current working
directory
• Absolutely, from the root, by using a relative or absolute pathname, respectively
• The difference is easily determined by the system, since absolute pathnames begin with
the oot ae o syol ad elative pathaes do’t.
• Whe a use euests a file fo the syste, the syste looks fo the file i the use’s
current working directory, or in the location specified by the pathname.
• Most systems also provide an environmental variable called path that allows the user to
specify other path locations that are to be searched for the file if a pathname is not
given and if the file is not found in the current working directory.
• There is a specified order to the search so that if there is more than one file that
qualifies, only the first file found is accessed.
• The user can also change his or her current working directory.
• The user moves around the tree using a CHANGE DIRECTORY command.
• An absolute or relative pathname can be used.
• To change the current working directory from directory
• For example, one could issue a CD command or one could use the full path name.
• On systems that do not allow relative pathnames above the current directory, the CD
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