The distro
# cat /etc/issue /etc/redhat-release \S Kernel \r on an \m CentOS Linux release 7.1.1503 (Core)
Install tigervnc-server
# yum install tigervnc-server
set the vnc password for the asystemuser user
# su asystemuser $ vncpasswd
puch the appropriate firewall holes
# firewall-cmd --permanent --zone=public --add-service vnc-server # firewall-cmd --reload
start VNC server as asystemuser
# su asystemuser $ vncserver
centos 7 vnc server