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- Overview of the DOS Batch Facility
-
- The DOS Batch Facility lets you execute many commands with just one command.
- The commands to be executed are stored in a "Batch File." A batch file may
- contain DOS commands, other batch file names, program names and Batch
- Subcommands. Batch files may have any valid filename but must have .BAT as the
- filename extension. To execute a batch file, enter the filename of the batch
- file. DOS will execute the commands, one by one, as if they were entered from
- the keyboard. Batch files are a convenient and time-saving feature. They
- provide a way to automate the execution of a series of commands.
-
- DOS has a special set of internal (resident in memory) commands that can be used
- in batch files. These are called "Batch Subcommands." They give the Batch
- Facility added function by allowing conditional execution of commands, repeated
- execution of commands and other operations which broaden the batch file's
- capability.
-
- Here is a simple batch file named STARTUP.BAT. It contains two commands:
-
- CHKDSK B:
- LOTUS
-
- This batch file is started by entering its name, STARTUP. DOS executes the first
- line, CHKDSK B: and then the next line, LOTUS.
-
- There is a special kind of batch file called AUTOEXEC.BAT. Each time DOS is
- started, it looks for an AUTOEXEC.BAT file (in the root directory) and, if
- found, executes it. This is a handy way to execute a number of commands each
- time the computer is started.
-
- You can terminate a batch file during its execution by pressing the CTRL key and
- then pressing the BREAK key. DOS will then respond with:
-
- Terminate batch job (Y/N)?
-
- If you press Y, DOS will terminate the batch file. If you press N, DOS will
- continue execution.