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.

• Reserved Words
• Simple Commands
• Pipelines
• Lists of Commands
• Compound Commands
• Coprocesses
• GNU Parallel