如何在Bash变量名称中使用`-`? [英] How to use `-` in the name of a Bash variable?

问题描述

我存储了一个名为 jenkins-vm ="Jenkins" 的变量，同时使用 echo $ jenkins-vm 调用了该变量我面临错误.在变量中使用-"时如何转义?

I stored a variable named jenkins-vm="Jenkins" while calling the variable using echo $jenkins-vm I am facing error. How can I escape "-" while using it in a variable?

推荐答案

在Bash shell的变量名中不允许使用连字符或破折号-.仅支持小写/大写 ASCII 字母、_(下划线)和数字，且首字符不得为数字.用下划线字符替换变量名称中的连字符将起作用，并且变量名称仍将易于阅读.

The hyphen or dash character - is not allowed in a variable name in the Bash shell. Only lowercase/uppercase ASCII letters , _ (underline), and digits are supported, and the first character must not be a digit. Replacing the hyphen(s) in the variable name with underline characters will work, and the variable name will still be easy to read.

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