在Linux下使用图形界面时出现的问题：“X: user not authorized to run the X server, aborting”
错误原因为：出于安全性的考虑，一般用户没有使用图形界面的权限。
This is just a simple tips to solve a error message when you start your X session with “startx” command as normal user. The error message may be like this:
blackgod@debian:~$ startx
xauth: creating new authority file /home/blackgod/.Xauthority
X: user not authorized to run the X server, aborting.
In linux, by default root user is allowed to run X server in most cases. So you don’t face this issue while running “startx” as root user.
Basically the Xorg X server needs to be configured to to authorize this user. Where should we configure this?
配置方法如下：
方法一：修改配置文件（用gedit修改时无法修改，可能为只读类型文件）
/etc/X11/Xwrapper.config – This file has as setting called “allowed_users”. It can accept three values:
1. root
2. anybody
3. console
The above values are self explanatory. You can edit this value to set as anybody for normal user to start X server. If normal user starts X server from console,console can also be set. It can be like this.
allowed_users=anybody
方法二：用命令修改
In Debian and its derivatives like Ubuntu, you can run the following command to do it in user friendly screen as shown below.
# dpkg-reconfigure x11-common