UNIX GUI (X11)

Infrastructure

UNIX

Screen Resolution

X11 Tunnelling

If your task requires an X Server...

You can use the server console (if the server happens to have an X11 capable console)
You can use X11 Tunnelling.
You can use VNC.
You can use XMing

VNC is recommended because it protects the task from network or client crashes.With VNC you can simply reconnect where you left off once the network or client issue is resolved.You can use SSH tunneling with VNC to make it more secure.Bear in mind the requirements of your choice of X Server when setting the DISPLAY environment variable.

UNIX Window Managers

VNC

UNIX Graphics Drivers

Screen Resolution

To see connected screens and supported resolutions...

xrandr

Screen 0: minimum 8 x 8, current 3840 x 1237, maximum 16384 x 16384DVI-I-0 disconnected (normal left inverted right x axis y axis)DVI-I-1 disconnected (normal left inverted right x axis y axis)DP-0 disconnected (normal left inverted right x axis y axis)DP-1 disconnected (normal left inverted right x axis y axis)DP-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.00*+ 59.94 1680x1050 59.95 1600x900 60.00 1440x900 59.89 1280x1024 60.02 1280x800 59.81 1280x720 60.00 59.94 1024x768 70.07 60.00 800x600 72.19 60.32 56.25 640x480 72.81 59.94 DP-3 connected 1920x1080+1920+157 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.00*+ 59.94 50.00 1680x1050 59.95 1600x900 60.00 1440x900 59.89 1280x1024 60.02 1280x800 59.81 1280x720 60.00 59.94 50.00 1024x768 60.00 800x600 60.32 56.25 720x576 50.00 720x480 59.94 640x480 59.94

To change resolution...

xrandr --output DP-2 --mode 1680x1050

X11 Tunnelling

Introduction

X11 tunnelling allows you to securely (using SSH) display and use a server X Window on your local PC.

Valid For

Servers where you cannot use VNC or a local X session.

Displays to PCs running a local X Server (e.g. XMing)

Pre-Requisites

These instructions assume the following filesets have been installed on your target AIX system:

X11.base.lib
X11.base.rte
X11.apps.config
X11.apps.clients

These instructions assume that your local X server is up and running.

To confirm it is listening on the default port (6000) use the following command at a Windows cmd prompt:

netstat -atn | findstr 6000

X11 Forwarding must be enabled in /etc/ssh/sshd_config

X11Forwarding yes

If you need to update sshd_config, remember to restart sshd:

stopsrc -s sshd; sleep 2; startsrc -s sshd

Instructions

Enable X11 Forwarding in PuTTY (Connection - SSH - X11)

Connect to your target server.

Login as your normal user.

Check the setting of the DISPLAY environment variable.

echo $DISPLAY

Obtain your XAUTH cookie:

xauth list

su to your target user.

su - oracle

Export the DISPLAY variable.

export DISPLAY=localhost:10.0

Set your XAUTH Cookie.

xauth add servername/unix:10 MIT-MAGIC-COOKIE-1 792637ea6f19c96d4c5f7c5a71b9913c

Start your X apps

xclock

When creating/configuring/upgrading database using DBCA/DBUA at 11g release 2,DBCA/DBUA hung or did not respond after clicking "Finish" button Cause: X Client I was using was XMING, which had a kind of bug.Solution: After installing Xming complete font package (Xming-fonts-7-5-0-70-setup.exe), I could create database using DBCA, this problem exist with Xming at Linux or Unix enviromnets.

Bibliography

https://www.techrepublic.com/article/how-to-securely-access-unix-based-systems-from-windows-with-vncOracle Support Note: 727290.1.
Screen Resolutionshttps://askubuntu.com/questions/907341/screen-resolution-problemhttps://xorg-team.pages.debian.net/xorg/howto/use-xrandr.html
xdpyinfohttps://linux.die.net/man/1/xdpyinfohttps://rpmfind.net/linux/rpm2html/search.php?query=xdpyinfohttps://stackoverflow.com/questions/7624657/why-are-xvisuals-repeated-in-xdpyinfo