更改Fedora的登录界面背景

进过一些必要的折腾，终于升级到了Fedora17,但是新系统的背景看着很是不爽，准备换一个，步骤如下：

Activities -> Applications -> System Tools -> System Settings -> Background

然后选择自己喜欢的图片，换上去。

但是，换上去一看，只是桌面的背景换了，登录界面的背景还是依旧。

好吧，google，然后找到 一片文章。

具体的操作步骤如下:

1. open terminal
2. su
3. xhost +  // 注意这里是 执行命令 xhost ， ’+’ 是xhost 命令的参数 不要敲错
4. sudo -u gdm dbus-launch gnome-control-center
5. Click background and select your background

关于第4个命令的解释如下，有人转载文章的时候会在不理解命令作用的情况下把命令给敲错了，结果误导人（发帖的人就是被害者），这里有人给出了解释：

sudo lets you execute a command as if you had logged into a different user account.

The -u option says which account, in this case the account is gdm

dbus-launch is the command that sudo is executing for you in the gdm account

gnome-control-center is a parameter you are giving to dbus-launch, it is another program that will be run (also in the gdm account).

All together, you type ONE command line just like this:
sudo -u gdm dbus-launch gnome-control-center

 

注记：貌似锁屏的壁纸还是老壁纸。