Creating a hard link to an ordinary file returns an error. What could be the reason for this?
A. The source file is hidden.
B. The source file is read-only.
C. The source file is a shell script.
D. The source file is already a hard link.
E. The source and the target are on different filesystems.
題解
建立一般檔案的實體連結(hard link)的時候，如果發生錯誤，那應該是因為連結檔案和被連結檔案路徑是在不同的檔案系統下。所以選項E是正確答案。