I just installed the vim-r-plugin on a Linux server and I found this issue (see below figure) prompted from the R console window (vimcom: Did you pass the --servername argument to Vim? ...) when I typed "\rf":

To solve the issue I followed the instructions here and was trying to find the "servername" and tested some commands such like:

But I have no idea what's the "--servername" I should use here. Any suggestions or answers? Thanks!