在oracle用户下执行xhost +出现错误，查看dbca的日志trace.log 日志路径：$ cd $ORACLE_HOME/cfgtoollogs/dbca 提示信息为：Exception in thread "main" java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. at sun.awt.X11GraphicsEnvironme...