什么是| (竖线字符)在shell(bash)命令中执行? [英] What does a | (pipe character) do in a shell (bash) command?

问题描述

我必须运行此命令来安装NPM.它有什么作用?什么是|最后呢?

I have to run this command to install NPM. What does it do? What is the | at the end?

curl https://raw.githubusercontent.com/creationix/nvm/v0.23.2/install.sh | bash

此外，我是否在Bash中运行类似UNIX的命令?为什么这样做? Bash是终端的UNIX命令兼容接口吗?

Also, am I running UNIX-like commands in Bash? Why does this work? Is it that Bash is a UNIX-command compatible interface for the terminal?

推荐答案

在bash(和大多数* nix外壳)中，|(管道)符号取自一个命令的输出，并将其用作下一个命令的输入

In bash (and most *nix shells) the | (pipe) symbol takes the output from one command and uses it as the input for the next command.

您在这里所做的就是使用curl检索install.sh文件，然后将其内容输出到bash中，该bash将执行install.sh的内容.

What you are doing here is using curl to retrieve the install.sh file and then output its contents into bash, which is a shell that will execute the contents of install.sh

简而言之，您正在下载并运行install.sh脚本.

In short, you are downloading and running the install.sh script.

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