https://wiki.x2go.org/doku.php/doc:installation:start
Install MATE on Centos 7
yum -y install epel-release
yum --enablerepo=epel -y groups install "MATE Desktop"
Install XFCE on Centos 7:
yum groupinstall "X Windows System" -y
yum groupinstall "Xfce4" -y