1、This application requires X display

ERROR: Unable to verify the graphical display setup. This application requires X display. Make sure that xdpyinfo exist under PATH variable.

解决方式：oracle安装图形显示依赖X display，需安装xorg-x11-utils包，按以下方式安装后验证。

[root@grid1-dahouzi-cn LINUX.X64_193000_grid_home]# ./gridSetup.sh 
ERROR: Unable to verify the graphical display setup. This application requires X display. Make sure that xdpyinfo exist under PATH variable.
/home/grid1/Public/LINUX.X64_193000_grid_home/perl/bin/perl: error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory

[root@grid1-dahouzi-cn LINUX.X64_193000_grid_home]# sudo yum -y install xorg-x11-utils
CentOS Linux 8 - AppStream                      118 kB/s | 6.3 MB     00:54    
CentOS Linux 8 - BaseOS                         103 kB/s | 2.3 MB     00:22    

Running transaction
  Preparing        :                                                        1/1 
  Verifying        : libdmx-1.1.4-3.el8.x86_64                              2/3 
  Verifying        : xorg-x11-utils-7.5-28.el8.x86_64                       3/3 
Installed products updated.

Installed:
  libXxf86dga-1.1.5-1.el8.x86_64             libdmx-1.1.4-3.el8.x86_64          
  xorg-x11-utils-7.5-28.el8.x86_64          

Complete!
##验证↓
[root@grid1-dahouzi-cn LINUX.X64_193000_grid_home]# xdpyinfo |grep name
name of display:    :0

2、libnsl.so.1: cannot open shared object file

/home/grid1/Public/LINUX.X64_193000_grid_home/perl/bin/perl: error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory

解决方式：yum install libnsl

[root@grid1-dahouzi-cn LINUX.X64_193000_grid_home]# ./gridSetup.sh 
/home/grid1/Public/LINUX.X64_193000_grid_home/perl/bin/perl: error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory

[root@grid1-dahouzi-cn LINUX.X64_193000_grid_home]# yum install libnsl
Last metadata expiration check: 0:07:38 ago on Mon 22 Feb 2021 11:53:31 AM PST.
Dependencies resolved.
================================================================================
 Package         Architecture    Version                  Repository       Size
================================================================================
Installing:
 libnsl          x86_64          2.28-127.el8             baseos           99 k

Transaction Summary
================================================================================
Install  1 Package

Total download size: 99 k
Running transaction
  Preparing        :                                                        1/1 
  Installing       : libnsl-2.28-127.el8.x86_64                             1/1 
Installed products updated.

Installed:
  libnsl-2.28-127.el8.x86_64                                                    

Complete!
[root@grid1-dahouzi-cn LINUX.X64_193000_grid_home]# ./gridSetup.sh 
ERROR: You must not be logged in as root to run this tool.