In order to access remote files (for example opening a pdf file), you will need to install an additional tool, called cyberduck.
Neue Verbindung(or new connection)
In the new window, make the following changes:
sftp in the dropdown menuserver box, type 134.176.27.78port box, type 30127Benutzername (or Username), type your username (like user1)Privater ssh Schlüssel (or private ssh key), select the file id_rsa in the .ssh subfolder in your home folder *(WARNING: make sure that you DO NOT select id_rsa.pub!)erweiterte Optionen, in the path box, type /home/user1 (change the username accordingly!)
Click on Verbinden (or Connect)