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The following example description file could maintain themake program.

Each command in the command file must be on a separate line. Once the command file is created, enter the following command on the command line:

sed -fCommandFile >Output <Input

In this command the parameters mean the following:

Parameter Definition
CommandFile The name of the file containing editing commands.
Output The name of the file to contain the edited output.
Input The name of the file, or files, to be edited.

The sed program then makes the changes and writes the changed information to the output file. The contents of the input file are not changed.