Mac? X11? Oracle Cloud Infrastructure? - How To Get runInstaller To run ...

Summary

Long story told short: Got two OCI machines and tried to install some Oracle stuff - Enterprise Manager, Database Software, Weblogic Server and such 'things'. Problem: How to install that without having a possibility to run a GUI? Well - I'm used to install oracle products using the 'silent' way. Nevertheless - How the heck can I get a GUI to run on a Mac? Here's the How To.

Environment

MacBook Pro (Mid 2014 - yes it's old, but I'm still waiting for the all new MacBook M1X, latest generation, 32GB RAM at least. Possibly, tomorrow I know more :-))

OCI - two machines running Linux, 32GB RAM, nothing special

To Do's

• Get XQUARTZ from the manufacturers website and install it on Your Mac

• connect to Your OCI machine(s) as user opc and login as root (sudo su -)

• check / change / edit '/etc/ssh/sshd_config:
  X11Forwarding yes
  X11UseLocalhost no

• restart sshd
  systemctl restart sshd

• install two more packages - xterm (nice to have to check x11) and xauth. Simply run the two statements. In case xterm and/or xauth are installed already, nothing happens.
  yum -y install xterm
  yum -y install xauth

Let's try ...

• start XQUARTZ

• connect as opc to Your OCI machine (doesn't matter if You use mac's terminal.app or an XQUARTZ window:
  ssh -CX opc@<OCI machine>

• In case You're connecting using a ssh key:
  ssh -CX -i <Path to the public key> opc@<OCI machine>

• run these two commands (You'll need the output right after the login as oracle):
  echo "xauth add $(xauth list | grep `echo $DISPLAY | awk '{ print substr($0,index($0,":"),3) }'` | grep `hostname`)"
  echo export DISPLAY=$DISPLAY

• connect as user oracle
  sudo su - oracle

• execute the result of the two commands (xauth and echo) - which is something like this:
  xauth add <oci machine hostname, full qualified>:<Display #>  MIT-MAGIC-COOKIE-1  <some kind of key>
  export DISPLAY=<IP>:<Display #>

• run Your GUI stuff :-)