Automated installation script to install Shadowsocks on Debian Jessie server (perfect for DigitalOcean droplet)

Shadowsocks4Debian.sh

#!/bin/bash

# A script that automates Shadowsocks on a Debian Jessie server
# Perfect for and tested on DigitalOcean 512MB ($5/month) Debian Jessie x64 droplet, as of July 2016
# Since this is modifying systemd servie script so it won't work on Debian Wheezy

# Disable nfs and rpcbind service (this is just for DigitalOcean Debian distros since these services are useless!)
systemctl stop nfs-common > /dev/null 2>&1
systemctl disable nfs-common > /dev/null 2>&1
systemctl stop nfs-common > /dev/null 2>&1
systemctl stop rpcbind > /dev/null 2>&1
systemctl disable rpcbind > /dev/null 2>&1
systemctl stop rpcbind > /dev/null 2>&1
netstat -lnput
echo -e "\n\nPlease confirm that sshd is the only service that is listening to a port. \n\n"
read -p "Press [Enter] key to start installing Shadowsocks..."

# Add Shadowsocks repo and install Shadowsocks-libev
echo "deb http://shadowsocks.org/debian wheezy main" > /etc/apt/sources.list.d/shadowsocks.list
wget -O- http://shadowsocks.org/debian/1D27208A.gpg | apt-key add -
apt-get update && apt-get dist-upgrade -y 
apt-get install shadowsocks-libev -y

# Replace original configuration file with this new version
# Change following configuration file with your desired server port and password
cat << EOF > /etc/shadowsocks-libev/config.json
{
    "server":["[::0]", "0.0.0.0"],
    "server_port":8388,
    "local_port":1080,
    "password":"password",
    "timeout":60,
    "method":"aes-256-cfb"
}
EOF

# Enable UDP relaying, then restart Shadowsocks service
sed -i 's/$CONFFILE/$CONFFILE -u/g' /lib/systemd/system/shadowsocks-libev.service
systemctl daemon-reload
systemctl restart shadowsocks-libev.service > /dev/null 2>&1
systemctl status shadowsocks-libev.service > /dev/null 2>&1

# That's it!
netstat -lnput

echo -e "\n\nPlease check if ss-server is listening to both tcp and udp ports.\n\n"
echo -e "\n\nYou may visit https://shadowsocks.org/en/config/quick-guide.html to generate Shadowsocks QR code. \n\n"
echo -e "\n\nFor iOS users, Shadowrocket is highly recommended. For other uses, an OpenWRT box with Shadowsocks and ChinaDNS is recommended. \n\n"