EECS 1012 Lecture Notes - Lecture 23: Bourne Shell, System Administrator
13 Jun 2018
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EECS 1012 Lecture 23 Notes
Introduction
Services to programs
• Login start-up files for a UNIX system depend on the default shell being used for the
system.
• The Bourne shell start-up script is called .login
• The C-shell script is called .cshrc.
• Since these files are text files, they can be easily communicated across a network to
provide uniform capability to all users on the network.
• This allos a syste adiistrator to chage eery user’s profile ith the odificatio
of a single file.
• Most of the discussion in this chapter has centered on the user interface and methods
of controlling and using the interface
• We would be remiss if we did not say a few additional words about services provided by
the operating system to application programs that support and affect the user interface.
• As we noted operating systems have long provided services to application programs in
the areas of file management, I/O processing, and system resource management
• A few operating systems, particularly the Macintosh OS, have provided services
• Such as the Toolbox that extend these capabilities to include the graphical user
interface.
• Services outside the operating system, but not quite applications either, such as X
Window, extend graphical capabilities to other systems.
• Windows provides similar services through the Win32 API.
• These services reflect the trend to expand the role of the operating system generally to
include services and support to application programs and users that provide many
capabilities that were formerly within the applications themselves.
• A UNIX system depends on the default shell being used for the system.
• The Bourne shell start-up script is called .login
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