Linux 中横线“-”作为文件名前缀
中横线“-”在linux中经常出现在命令参数中，例如：
ls -l
中横线“-”作为文件名，如果直接使用，会返回错误，例如：
mkdir -test
mkdir：无效选项 -- t
请尝试执行‘mkdir --help’来获取更多信息。
正确的用法：
mkdir ./-test
cd ./-test
rm ./-test
或者
mkdir -- -teset
cd -- -test
rm -- -test
ls -l
中横线“-”作为文件名，如果直接使用，会返回错误，例如：
mkdir -test
mkdir：无效选项 -- t
请尝试执行‘mkdir --help’来获取更多信息。
正确的用法：
mkdir ./-test
cd ./-test
rm ./-test
或者
mkdir -- -teset
cd -- -test
rm -- -test
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