pantheon是elemenrary os 的lightdm主题非常漂亮，pantheon主题需要lightdm-webkit-greeter，这里我们用lightdm-webkit2-greeter

1安装lightdm-webkit2-greeter
https://software.opensuse.org/download.html?project=home:antergos&package=lightdm-webkit2-greeter
在上面的网址中会有安装命令，或者可以直接下载deb包进行安装

sudo gedit /usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf

greeter-session=unity-greeter
修改为
greeter-session=lightdm-webkit2-greeter 

2 安装pantheon主题

git clone git@github.com:miko007/LightDM-Webkit-pantheon-theme.git pantheon
sudo mv pantheon /usr/share/lightdm-webkit/themes/

sudo gedit /etc/lightdm/lightdm-webkit2-greeter.conf 

[greeter]
webkit-theme = pantheon  #修改主题为pantheon

3 重启lightdm

sudo service lightdm restart