Use SSH to forward local Emacs server socket to remote host so emacsclient on remote host can open buffers in Emacs on local host

emacs-server-ssh-forwarding.org

• Get path of remote socket: execute on remote host

  emacs --batch --execute "(progn
          (require 'server)
          (princ (expand-file-name \"remote\" server-socket-dir)
                 #'external-debugging-output))"
      

• Get path of local socket: execute on local host

  emacs --batch --execute "(progn
          (require 'server)
          (princ (expand-file-name server-name server-socket-dir)
                 #'external-debugging-output))"
      

• Create SSH connection: execute on local host

  ssh -v -N -R /run/user/1000/emacs/remote:/var/folders/gk/rnw58qsx7t30_4rsndpzwww80000gn/T/emacs501/server remotehost
      

• Launch emacsclient: execute on remote host

  emacsclient -s remote -T /ssh:remotehost: .
      

• Configure ~/.ssh/config on local host to obviate need for -R option on command line

  Host remotehost
      RemoteForward /run/user/1000/emacs/remote /var/folders/gk/rnw58qsx7t30_4rsndpzwww80000gn/T/emacs501/server
      StreamLocalBindUnlink yes