Here you go I just ecountered this after install Oracle Linux 7.4 with minimal install. practically the same as CentOs Do the following:
yum update
yum install xauth
in the /etc/ssh/sshd_config the following seting needs to be set
X11Forwarding yes
in /etc/ssh/ssh_config, the following setting needs to be set
ForawardX11Trusted yes
Note: ForwardX11Trusted is usually set to yes by default.
After doing the above, reboot your server box. reconnect and you should be good to go.
You can also use a tool called mobraxterm if your going to be doing alot of x11 stuff. Its a more stable alternative to xming. Its basically putty with xming all in one.
You have to reboot your server after installing all package updates from the "yum update" command.
Hope this helps!
CentOS Minimal 7.3: Qt FATAL: QXcbConnection: Could not connect to display
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