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一个文件中的NUL字符(\0),是以换行符(\n)在内存中被存储的同时在显示的时候以^@呈现。
\0
\n
^@
查阅man 7 ascii和:h NL-used-for-Nul获取更多相关信息。
man 7 ascii
:h NL-used-for-Nul