运行dbca错误内容：
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
Error: Can't open display: :0.0
查了查资料和手册，以日常工作用的那个用户登录，在shell中运行
xhost local:oracle
non-network local connections being added to access control list
然后oracle身份就可以运行X程序了。