Redhat7.2使用xmanger登录

# 安装epel源

[root@webapp128 ~]# mount -o loop rhel-server-7.2-x86_64-dvd.iso /mnt/redhat7.2

#安装lightdm和Xfce

[root@webapp128 ~]# yum install -y lightdm

[root@webapp128 ~]# yum groupinstall -y xfce

# 修改lightdm.conf文件（配置文件中有详细的参数说明）

[root@webapp128 ~]# vim /etc/lightdm/lightdm.conf

[XDMCPServer]

enabled=true

port=177...

# 将Display Manager切换为lightdm

[root@webapp128 ~]# systemctl disable gdm && systemctl enable lightdm

# 启动lightdm

[root@webapp128 ~]# systemctl start lightdm

# 关闭或者取消防火墙(若已关闭则忽略)

[root@webapp128 ~]# systemctl stop firewalld.service

# 只保留/usr/share/xsessions/下xfce.desktop文件

[root@webapp128 ~]# cd /usr/share/xsessions/ && ls gnome-classic.desktop gnome-custom-session.desktop gnome.desktop xfce.desktop

[root@webapp128 ~]# mkdir back && mv gnome* back && ls back xfce.desktop

#启动lightdm

[root@webapp128 ~]# systemctl restart lightdm

#关闭lightdm

[root@webapp128 ~]# systemctl status lightdm