Which of the following is correct when talking about mount points?
A. Every existing directory can be used as a mount point.
B. Only empty directories can be used as a mount point.
C. Directories need to have the SetUID flag set to be used as a mount point.
D. Files within a directory are deleted when the directory is used as a mount point.
題解
選項A，正確。
選項B，所有目錄都可以被當作掛載點。
選項C，掛載點和SetUID(SUID)並沒有關聯。
選項D，原先在掛載點目錄下的檔案並不會被刪除。