如何在 Bash 的 here-doc 中抑制参数扩展？
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How can I suppress parameter expansion in a here-doc in Bash?
提问by Josh Nankin
I'd like to do the following in bash, but without having variables interpolated:
我想在 bash 中执行以下操作，但没有插入变量：
cat >aBashScript.sh <<EOL
$name
EOL
The file should contain $name, but instead it's empty. How does one do that?
该文件应包含$name，但它是空的。如何做到这一点？
回答by Michael
You can disable parameter expansion in here documentsby quoting the limit string:
您可以通过引用限制字符串来禁用此处文档中的参数扩展：
cat >aBashScript.sh <<'EOL'
$name
EOL
回答by Geoffrey
You need to escape the dollar sign, simply prefix it with a backslash to escape it like so:
您需要对美元符号进行转义，只需在其前面加上反斜杠即可转义，如下所示：
cat >aBashScript.sh <<EOL
$name
EOL
Or disable quoting as @Michael suggested.
或者按照@Michael 的建议禁用引用。
