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3.2 Shell Commands
A simple shell command such as echo a b c consists of the command
itself followed by arguments, separated by spaces.
More complex shell commands are composed of simple commands arranged together in a variety of ways: in a pipeline in which the output of one command becomes the input of a second, in a loop or conditional construct, or in some other grouping.
| 3.2.1 Simple Commands | The most common type of command. | |
| 3.2.2 Pipelines | Connecting the input and output of several commands. | |
| 3.2.3 Lists of Commands | How to execute commands sequentially. | |
| 3.2.4 Compound Commands | Shell commands for control flow. | |
| 3.2.5 Coprocesses | Two-way communication between commands. | |
| 3.2.6 GNU Parallel | Running commands in parallel. |
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