本文深入探讨了管道命令的基本概念、功能及其在Linux命令行中的应用。重点介绍了命令之间的连接方式、标准输入与输出的重定向，以及每个命令在管道执行过程中的独立执行特性。此外，还详细解释了管道命令如何通过管道实现数据的高效传输与处理。
1. Pipe's function:
The output of each command in the pipeline is connected via a pipeto the input of the next command. That is, each command reads the previous command's output. Thisconnection is performed before any redirections specified by thecommand.
2. Note:If ‘|&’ is used, the standard error of
command1 is connected tocommand2's standard input through the pipe; it is shorthand for2>&1 |. This implicit redirection of the standard error isperformed after any redirections specified
by the command.
3.Each command in a pipeline is executed in its own subshell
4.
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