1469648
Command-Line Interface
- Description
- User types in a command at a
character prompt and then the
operating system executes the
command.
- Used in the early days of computing
- Some of the commands may have 'switches' to provide options for the
command. E.g. in Microsoft operating systems, the command for listing the files
in a folder called 'DOCS' on drive C is DIR C:\DOCS
- Some instructions may have a number of switches
and the commands could become quite complex
- A switch, \W specifies that the
filenames are to be printed across
the screen instead of down and the
instruction that needs to be entered
at the command prompt is: DIR
C:\DOCS /W
- User types in a command at a
character prompt and then the
operating system executes the
command.
- Advantages
- Instructions execute quickly
- Instructions are versatile - meaning
the user can select a large number
of options for each intruction
- The operating system is smaller when
loaded onto memory
- Instructions execute quickly
- Disadvantages
- You need to learn the special intructions used
- If you mistype a command or
misspell a word then it cannot be
executed
- Some commands and their options can
be very complex, so high-levels of ICT are
needed
- You need to learn the special intructions used
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