Introduction To Pipelines

A pipeline is a device made up of pipes, pipe fittings, and valves used to transport gases, liquids, or fluids containing solid particles. Typically, fluids are pressurized by blowers, compressors, pumps, and boilers, flowing from high-pressure areas to low-pressure areas in pipelines. They can also be transported using their own pressure or gravity. Pipelines have a wide range of applications, primarily in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering, and various industrial installations.

**Pipeline** (English original: PipingSymbol)
**Chinese meaning:** Keyboard character | (the forward slash above the Enter key on a typical 101-key keyboard)
**Note:** Often used to provide the output of one command or program to another. For example, 'history|grepmcopy' (using the 'history' command) sends the contents of the 'bash_history' file to the 'grep' program to search for the string "mcopy".

**Several main means of inter-process communication in Linux** Pipes and named pipes are among the earliest inter-process communication mechanisms. Pipes can be used for communication between related processes, while named pipes overcome the limitation of pipes not having names. Therefore, in addition to the functions of pipes, they also allow communication between unrelated processes. Understanding the read and write rules of pipes and named pipes is key to applying them in programs.