可能有人请解释这个bash命令？ [英] Could someone please explain this bash command?

问题描述

从网站 RVM ：

bash < <( curl https://rvm.io/releases/rvm-install-head )

这是什么第一个小于号吗？关于什么＆LT;？（我知道这是一个愚蠢的问题，但我很想了解这

What does that first less-than symbol do? What about the <(? I know this is a stupid question, but I'd love to understand this.

推荐答案

击的进程替换替换≤（...）和＆GT;（...）从/到管道儿童。因此，整个事情的意思是创建卷曲... 管道，并用它作为标准输入打坏。

Bash's process substitution replaces <( ... ) and >( ... ) with pipes from/to children. Hence the whole thing means "create a pipe from curl ..., and use it as stdin to bash".

相当没有意义，倒不如写

Rather pointless, it would be better written

curl -L https://get.rvm.io | bash

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