Actually this problem:

[root@s1 ~]# yum install lxde Подготовка к установке Пакет lxde недоступен. Ошибка: Выполнять нечего 

What is the reason for its occurrence?

It happens even with elementary packages!

    1 answer 1

    This package is simply not in the standard Centos 6 repository. You can search for where it is - here pkgs.org