yum install tigervnc-server -y
cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service

User=root
PIDFile=/root/.vnc/%H%i.pid

vncpasswd (set password...)

systemctl daemon-reload
systemctl enable vncserver@:1.service
systemctl start vncserver@:1.service
systemctl stop vncserver@:1.service
vncserver :1 -geometry 1366x768 -depth 16

firewall-cmd --permanent --add-service vnc-server
systemctl restart firewalld.service