Commodore PC - Redirecting Command Input and Output; How to Redirect Your Output; Appending output

16 MS-DOS User's Reference
You can automatically set your path when you start MS-DOS by
including the path command in a file called autoexec, bat. Refer
to Chapter 4, "Batch Processing," for more information on the
autoexec, bat file.
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Redirecting output
Redirecting Command Input and Output
Usually, ms-dos receives input from the keyboard and sends its
output to the screen. You can, however, redirect this flow of com
mand input and output. For instance, you may want input to come
from a file instead of from the keyboard, and you may want out
put from a command to go to a file or lineprinter instead of to the
screen. With redirection you can also create pipes that let the out
put
from one command become the input for another command.
How to Redirect Your Output
By default, most commands send output to your monitor. If you
want
to change this and send the output to a file, you just use a
greater-than sign (>) in your command. For example, the follow
ing command displays on the screen a directory listing of the disk
in the default drive:
dir
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The dir command can send this output to a file named contents
if you type the following:
dir > contents
KJ
Appending output
If the contents file doesn't exist, ms-dos creates it and stores your
directory listing there. If contents does exist, MS DOS replaces what
is in the file with the new data.
If you want to append your directory or add one file to another
(instead of replacing the entire file), you can use two greater-than
signs (>>) to tell ms-dos to append the output of the command
(such as a directory listing) to the end of a specified file. For
example, the following command appends your directory listing
to an existing file named contents-.
dir >> contents
If contents doesn't exist, ms-dos creates it.
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