I want to use multitail over ssh. But following command fails:$ multitail ssh dev-04 tail -f /opt/app/app.logError opening file ssh docdev-04 tail -f /opt/alfresco/share.log (No such file or directory)However just ssh with tail works fine and displays the content of the file:$ ssh dev-04 tail -f /opt/app/app.log            Enter passphrase for key '/home/username/.ssh/id_rsa': 2016-08-03 09:40:27,926 INFO  [org.springframework.extensions.webscripts.DeclarativeRegistry] [localhost-startStop-1] Registered 8 Package Description Documents (+0 failed)I would guess that the problem is in the password request. But anyway I don't know how to make it work 
Multitail over ssh
ssh;multitail
According to the manpage of multitail you need the -l flag:-l commandCommand to execute in a window. Parameter is the command. Do not forget to use 's if the external command needs parameter! (e.g. -l ping host).So, in your case, try:multitail -l ssh dev-04 tail -f /opt/app/app.logIn your current form, multitail expects the argument ssh dev-04 tail -f /opt/app/app.log to be a file, not an application to execute and capture.I don't know how well the password input would work, but if that also fails, try ssh authentication by keys. (see, for instance: https://wiki.archlinux.org/index.php/SSH_keys)