爲什麼如果通過NFS安裝的程序系統爲空

Question

我很想看看能否顯示通過網絡安裝的/ proc虛擬文件系統的內容。所以我導出「/」並通過NFS將它掛載到另一個系統中。然後我做了cd到proc目錄並做了ls。它什麼都沒顯示。有人請解釋爲什麼它是空的。

Answer 1

請閱讀man 5 exports：

nohide This option is based on the option of the same name provided in 
      IRIX NFS. Normally, if a server exports two filesystems one of 
      which is mounted on the other, then the client will have to 
      mount both filesystems explicitly to get access to them. If it 
      just mounts the parent, it will see an empty directory at the 
      place where the other filesystem is mounted. That filesystem is 
      "hidden". 

默認情況下，客戶端不會看到嵌套的坐騎。