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Working with files and directories

Running a sequence of commands

When you type a command line and press <Enter>, the entire line is evaluated as a single unit. It is possible to run several programs from one line; either sequentially, or simultaneously, or in a ``pipeline'' where the output from one command is used as input to the second command. You can also store frequently-used commands in a file, and tell the shell to execute the contents of the file as a script.


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