环境：CentOS7.4

1. Install the nux repo

[root@CentOS7 ～]#  yum update # optional but recommanded
[root@CentOS7 ～]#  rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org^
[root@CentOS7 ～]#  yum -y install https://rpmfind.net/linux/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm
[root@CentOS7 ～]#  yum -y install http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

2. Install the necessary packages

[root@CentOS7 ～]#  yum install vlc