[LPIC-1]Security 3

With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)

Answer: DISPLAY

題解

「DISPLAY」環境變數的值為：

「hostname」是執行X server的主機名稱。

「D」是顯示的序號。

「S」是螢幕的號碼。