Set up XDCMP so that I can use the GUI remotely via MobaXTerm.
Configuring XDMCP and GDM on Red Hat Linux
Update /etc/gdm/custom.conf as shown before:
[security]
DisallowTCP=false
AllowRemoteRoot=true
[xdmcp]
Enable=true
gdm-restart
05 Install EM12CR3p1
07 Set Login Timeout and Login Profile