Shell脚本更改带有变量的目录 [英] Shell script change directory with variable

问题描述

我知道这个问题已经被问过无数次了，但是我仍然找不到任何好的解决方案.因此，再次询问是否有人可以帮助！！

I know this question has been asked numerous times, but I still could not find any good solution. Hence, asking it again if anyone can help !!

我正在尝试借助变量在shell脚本中更改我的工作目录.但是我每次都会得到" No such file or directory".

I am trying to change a my working directory inside a shell script with help of a variable. But I get " No such file or directory" everytime.

#!/bin/bash
echo ${RED_INSTANCE_NAME}   <-- This correctly displays the directory name
cd $RED_INSTANCE_NAME       <-- This line gives the error

现在，当我尝试提供实际的目录名称而不是使用变量时，shell会更改目录而不会出现问题

Now, when I try to give the actually directory name instead of using the variable, shell changes the directory without issues

cd test  <-- No error

有人知道这里的问题是什么吗?请帮忙!!

Does anyone knows what can be the issue here ? Please help !!

推荐答案

您的变量包含回车符.尝试说:

You variable contains a carriage return. Try saying:

cd $(echo $RED_INSTANCE_NAME | tr -d '\r')

，它应该可以工作.为了从变量中删除CR，您可以说:

and it should work. In order to remove the CR from the variable you can say:

RED_INSTANCE_NAME=$(echo $RED_INSTANCE_NAME | tr -d '\r')

---

以下内容将说明问题:

---

The following would illustrate the issue:

$ mkdir abc
$ foo=abc$'\r'
$ echo "${foo}"
abc
$ cd "${foo}"
: No such file or directory
$ echo $foo | od -x
0000000 6261 0d63 000a
0000005
$ echo $foo | tr -d '\r' | od -x
0000000 6261 0a63
0000004
$ echo $'\r' | od -x
0000000 0a0d
0000002

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