I have a question: 

How can I open a file in these steps:

1.open an Emacs on my client(desktop)

2.connect to my server by Emacs with ssh

3.connect to my second server with ssh

4.open the file in the second server

the problem is that I can not connect from the first server to second server over ssh by Emacs

this command in the find file doesn't work:

Find file : /scpc:root@myfirstserver:scpc:root@mysecondserver/var/www/myfile.txt