this code testing on ubuntu 18.04.* is ok.
apt-get install sniproxy dnsmasq -y
cp dnsmasq.conf /etc/dnsmasq.conf
cp sniproxy.conf /etc/sniproxy.conf
curl -s http://nginx.org/keys/nginx_signing.key | apt-key add -
cat > /etc/apt/sources.list.d/nginx.list << EOF
deb http://nginx.org/packages/$(. /etc/os-release; echo "$ID")/ $(lsb_release -cs) nginx
deb-src http://nginx.org/packages/$(. /etc/os-release; echo "$ID")/ $(lsb_release -cs) nginx
EOF
apt-get update
apt-get install nginx=1.16.* -y
# change nginx configure file `92` line for your server ip
cp nginx.conf /etc/nginx/nginx.conf
systemctl restart sniproxy dnsmasq nginx
systemctl enable sniproxy dnsmasq nginx
please read the v2ray.json file.
modify the 121 line with your sniproxy server ip address
then run this command:
sed "1i\nameserver sniproxyip" /etc/resolv.conf
enjoy it.