&&和有什么区别?和 ;在bash或命令? [英] What is the difference between && and ; in bash or command?

问题描述

bash或命令中的&&和;有什么区别? 例如:

What is the difference between && and ; in bash or command? Eg:

~$ echo one && echo two

和

~$ echo one ; echo two

推荐答案

~$ echo one && echo two

仅当第一个命令成功时，此命令才运行2..

This runs the 2. command only if the first command succeeds.

~$ echo one ; echo two

这总是运行2.命令.

~$ echo one || echo two

仅当第一个命令失败时，此命令才运行2..

This runs the 2. command only if the first command fails.

如果命令的退出代码为0，则该命令被视为成功；如果命令的退出代码，则该命令被视为失败. 其退出代码为！= 0.

A command is considered successful if its exit code is 0, and considered failed if its exit code is != 0.

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