今天在Oracle linux下配置了一下X manager 和vnc，是第一次配置vnc，vnc配置要比X manager简单许多这里记录一下：
---- X manager 配置：
1.修改GDM的配置文件，/etc/X11/gdm/gdm.conf，将[xdmcp]中的enable选项设置为true
[xdmcp]
# Distributions: Ship with this off. It is never a safe thing to leave
# out on the net. Setting up /etc/hosts.allow and /etc/hosts.deny to only
# allow local access is another alternative but not the safest.
# Firewalling port 177 is the safest if you wish to have xdmcp on.
# Read the manual for more notes on the security of XDMCP.
Enable=true
用vi编辑gdm.conf 进入后键入/xdmcp查找字符串xdmcp "n"是搜索下一句，这样就能快速的定位到xdmcp项
2.修改/etc/X11/xdm/xdm-config文件，将DisplayManager.requestPort: 0注释掉
! SECURITY: do not listen for XDMCP or Chooser requests
! Comment out this line if you want to manage X terminals with xdm
!DisplayManager.requestPort: 0
3.修改/etc/X11/xdm/Xaccess文件 #* #any host can get a login window 去掉此行首位的#
# right hand sides can match.
#
* #any host can get a login window
#
# To hardwire a specific terminal to a specific host, you can
4. 如果有防火墙，请打开177的端口
ok！配置完后用X manager进入吧