Issue : While installing Oracle DB 18c, this error continued to frustrate me, asking for x11 display, tried different suggestions from google but finally one suggestion worked.
Error is seen when you try to launch oracle installation..
[oracle@redhat stage]$ ./runInstaller
ERROR: Unable to verify the graphical display setup. This application requires X display. Make sure that xdpyinfo exist under PATH variable. No protocol specified. Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
Solution that worked in this case:
[root@redhat stage]# yum install xorg-x11-xauth xterm
Package 1:xorg-x11-xauth-1.0.9-1.el7.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package xterm.x86_64 0:295-3.el7 will be installed
--> Processing Dependency: libXaw.so.7()(64bit) for package: xterm-295-3.el7.x86_64
--> Running transaction check
---> Package libXaw.x86_64 0:1.0.13-4.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
============================================================================================================================================
Package Arch Version Repository Size
============================================================================================================================================
Installing:
xterm x86_64 295-3.el7 base 455 k
Installing for dependencies:
libXaw x86_64 1.0.13-4.el7 base 192 k
Transaction Summary
============================================================================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 647 k
Installed size: 1.7 M
Is this ok [y/d/N]: y
Downloading packages:
(1/2): libXaw-1.0.13-4.el7.x86_64.rpm | 192 kB 00:00:00
(2/2): xterm-295-3.el7.x86_64.rpm | 455 kB 00:00:00
--------------------------------------------------------------------------------------------------------------------------------------------
Total 1.1 MB/s | 647 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : libXaw-1.0.13-4.el7.x86_64 1/2
Installing : xterm-295-3.el7.x86_64 2/2
Verifying : libXaw-1.0.13-4.el7.x86_64 1/2
Verifying : xterm-295-3.el7.x86_64 2/2
Installed:
xterm.x86_64 0:295-3.el7
Dependency Installed:
libXaw.x86_64 0:1.0.13-4.el7
[root@redhat stage]# ssh -Y oracle@redhat.lab.com
Back to non-root user: Run the installer again..
[oracle@redhat stage]$ ./runInstaller
This time it worked, Installation poped-up.
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