RPMs are in the Oracle Linux 8 CodeReady Builder repo which is not on any of the ISOs, only yum.oracle.com must be installed
# dnf config-manager --enable ol8_codeready_builder
# dnf install xorg-x11-apps
Make sure private and public Windows firewall is off – in other words must be able to ping in both directions – and if you are doing this on VirtualBox use “Bridged Networking”.
run xming server on windows
turn x11 forwarding on in putty
On Linux host, mod to allow x11 forwarding in /etc/ssh/sshd_config – I changed all 3 of these…
11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes
# if you get the message
Warning: Missing charsets in String to FontSet conversion
the this will remediate
export LC_ALL=C
ssh to root - then xhost + su - oracle DISPLAY=192.168.1.247:0.0; export DISPLAY
and last but not least fallback to a older release if it’s too new
xclock # if xclock works and you are running a newer version of Linux export CV_ASSUME_DISTID=OEL7.8 # or ./runInstaller