Where can you download "Xubuntu-desktop"?

[googshop]

i install ubuntu on my NB,but i want install xfce desktop,i can use command "sudo apt-get install kubuntu-desktop" install kde desktop,but use "sudo..........xubuntu-desktop"command tell me can't find "xubuntu-desktop",where can i download????
Thanks!

[jaguar00]

open the synatic to find "xfce4". then install it.

[the last apple]

是不是跟源有关系？
我用的是cn99和sjtu的源，在家里的机子上安装xubuntu-desktop 成功。