diff --git a/README.md b/README.md
index 0b5655a..5397c74 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 详细安装 shadowsocks server
 ---
-- [搭建shadowsocksR](https://github.com/breakwa11/shadowsocks-rss/wiki/Server-Setup)
+- [搭建shadowsocksR](https://github.com/iMeiji/shadowsocks_install/blob/master/shadowsocksR-wiki/Server-Setup.md)
 - [搭建shadowsocks libev](https://github.com/iMeiji/shadowsocks_install/wiki/shadowsocks-libev)
 - [搭建shadowsocksR libev](https://github.com/iMeiji/shadowsocks_install/wiki/shadowsocksR-libev)
 
@@ -21,10 +21,13 @@
 | [net speeder](https://github.com/iMeiji/shadowsocks_install/wiki/Net-Speeder) | [kcptun](https://github.com/xtaci/kcptun) |
 | [serverspeeder](https://github.com/91yun/serverspeeder) | [FinalSpeed](https://github.com/91yun/finalspeed) |
 | [TCP BBR](https://github.com/iMeiji/shadowsocks_install/wiki/%E5%BC%80%E5%90%AFTCP-BBR%E6%8B%A5%E5%A1%9E%E6%8E%A7%E5%88%B6%E7%AE%97%E6%B3%95) |                                          |
+| [TCP BBR 魔改版](https://moeclub.org/2017/06/24/278/) |                                          |
 
 
 其他
 ---
 - [搭建OpenConnect VPN server](https://github.com/iMeiji/shadowsocks_install/wiki/OpenConnect-VPN-server)
-- [shadowsocksR 文档](https://github.com/iMeiji/shadowsocks_install/shadowsocksR-wiki)
+- [shadowsocksR 文档](https://github.com/iMeiji/shadowsocks_install/tree/master/shadowsocksR-wiki)
+- [shadowsocksR 客户端](https://github.com/iMeiji/shadowsocks_install/releases/tag/0.13)
+
 
diff --git a/shadowsocksR.sh b/shadowsocksR.sh
index fba7948..8c535a2 100644
--- a/shadowsocksR.sh
+++ b/shadowsocksR.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
 export PATH
 #=================================================================#
@@ -10,176 +10,387 @@ export PATH
 #=================================================================#
 
 clear
-echo ""
+echo
 echo "#############################################################"
 echo "# One click Install ShadowsocksR Server                     #"
 echo "# Intro: https://shadowsocks.be/9.html                      #"
 echo "# Author: Teddysun <i@teddysun.com>                         #"
-echo "# Thanks: @breakwa11 <https://twitter.com/breakwa11>        #"
+echo "# Github: https://github.com/shadowsocksr/shadowsocksr      #"
 echo "#############################################################"
-echo ""
+echo
 
 #Current folder
 cur_dir=`pwd`
-# Get public IP address
-IP=$(ip addr | egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | egrep -v "^192\.168|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-2]\.|^10\.|^127\.|^255\." | head -n 1)
-if [[ "$IP" = "" ]]; then
-    IP=$(wget -qO- -t1 -T2 ipv4.icanhazip.com)
-fi
+# Stream Ciphers
+ciphers=(
+none
+aes-256-cfb
+aes-192-cfb
+aes-128-cfb
+aes-256-cfb8
+aes-192-cfb8
+aes-128-cfb8
+aes-256-ctr
+aes-192-ctr
+aes-128-ctr
+chacha20-ietf
+chacha20
+rc4-md5
+rc4-md5-6
+)
+# Reference URL:
+# https://github.com/breakwa11/shadowsocks-rss/blob/master/ssr.md
+# https://github.com/breakwa11/shadowsocks-rss/wiki/config.json
+# Protocol
+protocols=(
+origin
+verify_deflate
+auth_sha1_v4
+auth_sha1_v4_compatible
+auth_aes128_md5
+auth_aes128_sha1
+auth_chain_a
+auth_chain_b
+)
+# obfs
+obfs=(
+plain
+http_simple
+http_simple_compatible
+http_post
+http_post_compatible
+tls1.2_ticket_auth
+tls1.2_ticket_auth_compatible
+tls1.2_ticket_fastauth
+tls1.2_ticket_fastauth_compatible
+)
+# Color
+red='\033[0;31m'
+green='\033[0;32m'
+yellow='\033[0;33m'
+plain='\033[0m'
 
 # Make sure only root can run our script
-function rootness(){
-    if [[ $EUID -ne 0 ]]; then
-       echo "Error:This script must be run as root!" 1>&2
-       exit 1
+[[ $EUID -ne 0 ]] && echo -e "[${red}Error${plain}] This script must be run as root!" && exit 1
+
+# Disable selinux
+disable_selinux(){
+    if [ -s /etc/selinux/config ] && grep 'SELINUX=enforcing' /etc/selinux/config; then
+        sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
+        setenforce 0
     fi
 }
 
-# Check OS
-function checkos(){
-    if [ -f /etc/redhat-release ];then
-        OS='CentOS'
-    elif [ ! -z "`cat /etc/issue | grep bian`" ];then
-        OS='Debian'
-    elif [ ! -z "`cat /etc/issue | grep Ubuntu`" ];then
-        OS='Ubuntu'
-    else
-        echo "Not support OS, Please reinstall OS and retry!"
-        exit 1
+#Check system
+check_sys(){
+    local checkType=$1
+    local value=$2
+
+    local release=''
+    local systemPackage=''
+
+    if [[ -f /etc/redhat-release ]]; then
+        release="centos"
+        systemPackage="yum"
+    elif cat /etc/issue | grep -Eqi "debian"; then
+        release="debian"
+        systemPackage="apt"
+    elif cat /etc/issue | grep -Eqi "ubuntu"; then
+        release="ubuntu"
+        systemPackage="apt"
+    elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then
+        release="centos"
+        systemPackage="yum"
+    elif cat /proc/version | grep -Eqi "debian"; then
+        release="debian"
+        systemPackage="apt"
+    elif cat /proc/version | grep -Eqi "ubuntu"; then
+        release="ubuntu"
+        systemPackage="apt"
+    elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then
+        release="centos"
+        systemPackage="yum"
+    fi
+
+    if [[ ${checkType} == "sysRelease" ]]; then
+        if [ "$value" == "$release" ]; then
+            return 0
+        else
+            return 1
+        fi
+    elif [[ ${checkType} == "packageManager" ]]; then
+        if [ "$value" == "$systemPackage" ]; then
+            return 0
+        else
+            return 1
+        fi
     fi
 }
 
 # Get version
-function getversion(){
-    if [[ -s /etc/redhat-release ]];then
+getversion(){
+    if [[ -s /etc/redhat-release ]]; then
         grep -oE  "[0-9.]+" /etc/redhat-release
-    else    
+    else
         grep -oE  "[0-9.]+" /etc/issue
-    fi    
+    fi
 }
 
 # CentOS version
-function centosversion(){
-    local code=$1
-    local version="`getversion`"
-    local main_ver=${version%%.*}
-    if [ $main_ver == $code ];then
-        return 0
+centosversion(){
+    if check_sys sysRelease centos; then
+        local code=$1
+        local version="$(getversion)"
+        local main_ver=${version%%.*}
+        if [ "$main_ver" == "$code" ]; then
+            return 0
+        else
+            return 1
+        fi
     else
         return 1
-    fi        
+    fi
 }
 
-# Disable selinux
-function disable_selinux(){
-if [ -s /etc/selinux/config ] && grep 'SELINUX=enforcing' /etc/selinux/config; then
-    sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
-    setenforce 0
-fi
+# Get public IP address
+get_ip(){
+    local IP=$( ip addr | egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | egrep -v "^192\.168|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-2]\.|^10\.|^127\.|^255\.|^0\." | head -n 1 )
+    [ -z ${IP} ] && IP=$( wget -qO- -t1 -T2 ipv4.icanhazip.com )
+    [ -z ${IP} ] && IP=$( wget -qO- -t1 -T2 ipinfo.io/ip )
+    [ ! -z ${IP} ] && echo ${IP} || echo
+}
+
+get_char(){
+    SAVEDSTTY=`stty -g`
+    stty -echo
+    stty cbreak
+    dd if=/dev/tty bs=1 count=1 2> /dev/null
+    stty -raw
+    stty echo
+    stty $SAVEDSTTY
 }
 
 # Pre-installation settings
-function pre_install(){
-    # Not support CentOS 5
-    if centosversion 5; then
-        echo "Not support CentOS 5.x, please change OS to CentOS 6,7/Debian/Ubuntu and retry."
+pre_install(){
+    if check_sys packageManager yum || check_sys packageManager apt; then
+        # Not support CentOS 5
+        if centosversion 5; then
+            echo -e "$[{red}Error${plain}] Not supported CentOS 5, please change to CentOS 6+/Debian 7+/Ubuntu 12+ and try again."
+            exit 1
+        fi
+    else
+        echo -e "[${red}Error${plain}] Your OS is not supported. please change OS to CentOS/Debian/Ubuntu and try again."
         exit 1
     fi
     # Set ShadowsocksR config password
     echo "Please input password for ShadowsocksR:"
     read -p "(Default password: teddysun.com):" shadowsockspwd
-    [ -z "$shadowsockspwd" ] && shadowsockspwd="teddysun.com"
-    echo ""
+    [ -z "${shadowsockspwd}" ] && shadowsockspwd="teddysun.com"
+    echo
     echo "---------------------------"
-    echo "password = $shadowsockspwd"
+    echo "password = ${shadowsockspwd}"
     echo "---------------------------"
-    echo ""
+    echo
     # Set ShadowsocksR config port
     while true
     do
     echo -e "Please input port for ShadowsocksR [1-65535]:"
     read -p "(Default port: 8989):" shadowsocksport
-    [ -z "$shadowsocksport" ] && shadowsocksport="8989"
-    expr $shadowsocksport + 0 &>/dev/null
+    [ -z "${shadowsocksport}" ] && shadowsocksport="8989"
+    expr ${shadowsocksport} + 1 &>/dev/null
     if [ $? -eq 0 ]; then
-        if [ $shadowsocksport -ge 1 ] && [ $shadowsocksport -le 65535 ]; then
-            echo ""
+        if [ ${shadowsocksport} -ge 1 ] && [ ${shadowsocksport} -le 65535 ]; then
+            echo
             echo "---------------------------"
-            echo "port = $shadowsocksport"
+            echo "port = ${shadowsocksport}"
             echo "---------------------------"
-            echo ""
+            echo
             break
         else
-            echo "Input error! Please input correct number."
+            echo -e "[${red}Error${plain}] Input error, please input a number between 1 and 65535"
         fi
     else
-        echo "Input error! Please input correct number."
+        echo -e "[${red}Error${plain}] Input error, please input a number between 1 and 65535"
+    fi
+    done
+
+    # Set shadowsocksR config stream ciphers
+    while true
+    do
+    echo -e "Please select stream cipher for ShadowsocksR:"
+    for ((i=1;i<=${#ciphers[@]};i++ )); do
+        hint="${ciphers[$i-1]}"
+        echo -e "${green}${i}${plain}) ${hint}"
+    done
+    read -p "Which cipher you'd select(Default: ${ciphers[1]}):" pick
+    [ -z "$pick" ] && pick=2
+    expr ${pick} + 1 &>/dev/null
+    if [ $? -ne 0 ]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number"
+        continue
     fi
+    if [[ "$pick" -lt 1 || "$pick" -gt ${#ciphers[@]} ]]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number between 1 and ${#ciphers[@]}"
+        continue
+    fi
+    shadowsockscipher=${ciphers[$pick-1]}
+    echo
+    echo "---------------------------"
+    echo "cipher = ${shadowsockscipher}"
+    echo "---------------------------"
+    echo
+    break
     done
-    get_char(){
-        SAVEDSTTY=`stty -g`
-        stty -echo
-        stty cbreak
-        dd if=/dev/tty bs=1 count=1 2> /dev/null
-        stty -raw
-        stty echo
-        stty $SAVEDSTTY
-    }
-    echo ""
+
+    # Set shadowsocksR config protocol
+    while true
+    do
+    echo -e "Please select protocol for ShadowsocksR:"
+    for ((i=1;i<=${#protocols[@]};i++ )); do
+        hint="${protocols[$i-1]}"
+        echo -e "${green}${i}${plain}) ${hint}"
+    done
+    read -p "Which protocol you'd select(Default: ${protocols[0]}):" protocol
+    [ -z "$protocol" ] && protocol=1
+    expr ${protocol} + 1 &>/dev/null
+    if [ $? -ne 0 ]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number"
+        continue
+    fi
+    if [[ "$protocol" -lt 1 || "$protocol" -gt ${#protocols[@]} ]]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number between 1 and ${#protocols[@]}"
+        continue
+    fi
+    shadowsockprotocol=${protocols[$protocol-1]}
+    echo
+    echo "---------------------------"
+    echo "protocol = ${shadowsockprotocol}"
+    echo "---------------------------"
+    echo
+    break
+    done
+
+    # Set shadowsocksR config obfs
+    while true
+    do
+    echo -e "Please select obfs for ShadowsocksR:"
+    for ((i=1;i<=${#obfs[@]};i++ )); do
+        hint="${obfs[$i-1]}"
+        echo -e "${green}${i}${plain}) ${hint}"
+    done
+    read -p "Which obfs you'd select(Default: ${obfs[0]}):" r_obfs
+    [ -z "$r_obfs" ] && r_obfs=1
+    expr ${r_obfs} + 1 &>/dev/null
+    if [ $? -ne 0 ]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number"
+        continue
+    fi
+    if [[ "$r_obfs" -lt 1 || "$r_obfs" -gt ${#obfs[@]} ]]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number between 1 and ${#obfs[@]}"
+        continue
+    fi
+    shadowsockobfs=${obfs[$r_obfs-1]}
+    echo
+    echo "---------------------------"
+    echo "obfs = ${shadowsockobfs}"
+    echo "---------------------------"
+    echo
+    break
+    done
+
+    echo
     echo "Press any key to start...or Press Ctrl+C to cancel"
     char=`get_char`
     # Install necessary dependencies
-    if [ "$OS" == 'CentOS' ]; then
-        yum install -y wget unzip openssl-devel gcc swig python python-devel python-setuptools autoconf libtool libevent
-        yum install -y m2crypto automake make curl curl-devel zlib-devel perl perl-devel cpio expat-devel gettext-devel
-    else
+    if check_sys packageManager yum; then
+        yum install -y python python-devel python-setuptools openssl openssl-devel curl wget unzip gcc automake autoconf make libtool
+    elif check_sys packageManager apt; then
         apt-get -y update
-        apt-get -y install python python-dev python-pip python-m2crypto curl wget unzip gcc swig automake make perl cpio build-essential
+        apt-get -y install python python-dev python-setuptools openssl libssl-dev curl wget unzip gcc automake autoconf make libtool
     fi
-    cd $cur_dir
+    cd ${cur_dir}
 }
 
 # Download files
-function download_files(){
+download_files(){
     # Download libsodium file
-    if ! wget --no-check-certificate -O libsodium-1.0.8.tar.gz https://github.com/jedisct1/libsodium/releases/download/1.0.8/libsodium-1.0.8.tar.gz; then
-        echo "Failed to download libsodium file!"
+    if ! wget --no-check-certificate -O libsodium-1.0.13.tar.gz https://github.com/jedisct1/libsodium/releases/download/1.0.13/libsodium-1.0.13.tar.gz; then
+        echo -e "[${red}Error${plain}] Failed to download libsodium-1.0.13.tar.gz!"
         exit 1
     fi
     # Download ShadowsocksR file
-    if ! wget --no-check-certificate -O manyuser.zip https://github.com/breakwa11/shadowsocks/archive/manyuser.zip; then
-        echo "Failed to download ShadowsocksR file!"
+    if ! wget --no-check-certificate -O manyuser.zip https://github.com/teddysun/shadowsocksr/archive/manyuser.zip; then
+        echo -e "[${red}Error${plain}] Failed to download ShadowsocksR file!"
         exit 1
     fi
-    # Download ShadowsocksR chkconfig file
-    if [ "$OS" == 'CentOS' ]; then
+    # Download ShadowsocksR init script
+    if check_sys packageManager yum; then
         if ! wget --no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocksR -O /etc/init.d/shadowsocks; then
-            echo "Failed to download ShadowsocksR chkconfig file!"
+            echo -e "[${red}Error${plain}] Failed to download ShadowsocksR chkconfig file!"
             exit 1
         fi
-    else
+    elif check_sys packageManager apt; then
         if ! wget --no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocksR-debian -O /etc/init.d/shadowsocks; then
-            echo "Failed to download ShadowsocksR chkconfig file!"
+            echo -e "[${red}Error${plain}] Failed to download ShadowsocksR chkconfig file!"
             exit 1
         fi
     fi
 }
 
+# Firewall set
+firewall_set(){
+    echo "firewall set start..."
+    if centosversion 6; then
+        /etc/init.d/iptables status > /dev/null 2>&1
+        if [ $? -eq 0 ]; then
+            iptables -L -n | grep -i ${shadowsocksport} > /dev/null 2>&1
+            if [ $? -ne 0 ]; then
+                iptables -I INPUT -m state --state NEW -m tcp -p tcp --dport ${shadowsocksport} -j ACCEPT
+                iptables -I INPUT -m state --state NEW -m udp -p udp --dport ${shadowsocksport} -j ACCEPT
+                /etc/init.d/iptables save
+                /etc/init.d/iptables restart
+            else
+                echo "port ${shadowsocksport} has been set up."
+            fi
+        else
+            echo -e "[${yellow}Warning${plain}] iptables looks like shutdown or not installed, please manually set it if necessary."
+        fi
+    elif centosversion 7; then
+        systemctl status firewalld > /dev/null 2>&1
+        if [ $? -eq 0 ]; then
+            firewall-cmd --permanent --zone=public --add-port=${shadowsocksport}/tcp
+            firewall-cmd --permanent --zone=public --add-port=${shadowsocksport}/udp
+            firewall-cmd --reload
+        else
+            echo "Firewalld looks like not running, try to start..."
+            systemctl start firewalld
+            if [ $? -eq 0 ]; then
+                firewall-cmd --permanent --zone=public --add-port=${shadowsocksport}/tcp
+                firewall-cmd --permanent --zone=public --add-port=${shadowsocksport}/udp
+                firewall-cmd --reload
+            else
+                echo -e "[${yellow}Warning${plain}] Try to start firewalld failed. please enable port ${shadowsocksport} manually if necessary."
+            fi
+        fi
+    fi
+    echo "firewall set completed..."
+}
+
 # Config ShadowsocksR
-function config_shadowsocks(){
+config_shadowsocks(){
     cat > /etc/shadowsocks.json<<-EOF
 {
     "server":"0.0.0.0",
-    "server_ipv6":"::",
+    "server_ipv6":"[::]",
     "server_port":${shadowsocksport},
     "local_address":"127.0.0.1",
     "local_port":1080,
     "password":"${shadowsockspwd}",
     "timeout":120,
-    "method":"aes-256-cfb",
-    "protocol":"origin",
+    "method":"${shadowsockscipher}",
+    "protocol":"${shadowsockprotocol}",
     "protocol_param":"",
-    "obfs":"plain",
+    "obfs":"${shadowsockobfs}",
     "obfs_param":"",
     "redirect":"",
     "dns_ipv6":false,
@@ -190,114 +401,112 @@ EOF
 }
 
 # Install ShadowsocksR
-function install_ss(){
+install(){
     # Install libsodium
-    tar zxf libsodium-1.0.8.tar.gz
-    cd $cur_dir/libsodium-1.0.8
-    ./configure && make && make install
+    if [ ! -f /usr/lib/libsodium.a ]; then
+        cd ${cur_dir}
+        tar zxf libsodium-1.0.13.tar.gz
+        cd libsodium-1.0.13
+        ./configure --prefix=/usr && make && make install
+        if [ $? -ne 0 ]; then
+            echo -e "[${red}Error${plain}] libsodium install failed!"
+            install_cleanup
+            exit 1
+        fi
+    fi
+
     ldconfig
     # Install ShadowsocksR
-    cd $cur_dir
+    cd ${cur_dir}
     unzip -q manyuser.zip
     mv shadowsocksr-manyuser/shadowsocks /usr/local/
     if [ -f /usr/local/shadowsocks/server.py ]; then
         chmod +x /etc/init.d/shadowsocks
-        # Add run on system start up
-        if [ "$OS" == 'CentOS' ]; then
+        if check_sys packageManager yum; then
             chkconfig --add shadowsocks
             chkconfig shadowsocks on
-        else
-            update-rc.d shadowsocks defaults
+        elif check_sys packageManager apt; then
+            update-rc.d -f shadowsocks defaults
         fi
-        # Run ShadowsocksR in the background
         /etc/init.d/shadowsocks start
+
         clear
-        echo ""
-        echo "Congratulations, ShadowsocksR install completed!"
-        echo -e "Server IP: \033[41;37m ${IP} \033[0m"
-        echo -e "Server Port: \033[41;37m ${shadowsocksport} \033[0m"
-        echo -e "Password: \033[41;37m ${shadowsockspwd} \033[0m"
-        echo -e "Local IP: \033[41;37m 127.0.0.1 \033[0m"
-        echo -e "Local Port: \033[41;37m 1080 \033[0m"
-        echo -e "Protocol: \033[41;37m origin \033[0m"
-        echo -e "obfs: \033[41;37m plain \033[0m"
-        echo -e "Encryption Method: \033[41;37m aes-256-cfb \033[0m"
-        echo ""
+        echo
+        echo -e "Congratulations, ShadowsocksR server install completed!"
+        echo -e "Your Server IP        : \033[41;37m $(get_ip) \033[0m"
+        echo -e "Your Server Port      : \033[41;37m ${shadowsocksport} \033[0m"
+        echo -e "Your Password         : \033[41;37m ${shadowsockspwd} \033[0m"
+        echo -e "Your Protocol         : \033[41;37m ${shadowsockprotocol} \033[0m"
+        echo -e "Your obfs             : \033[41;37m ${shadowsockobfs} \033[0m"
+        echo -e "Your Encryption Method: \033[41;37m ${shadowsockscipher} \033[0m"
+        echo
         echo "Welcome to visit:https://shadowsocks.be/9.html"
-        echo "If you want to change protocol & obfs, reference URL:"
-        echo "https://github.com/breakwa11/shadowsocks-rss/wiki/Server-Setup"
-        echo ""
         echo "Enjoy it!"
-        echo ""
+        echo
     else
-        echo "Shadowsocks install failed! Please Email to Teddysun <i@teddysun.com> and contact."
+        echo "ShadowsocksR install failed, please Email to Teddysun <i@teddysun.com> and contact"
         install_cleanup
         exit 1
     fi
 }
 
 # Install cleanup
-function install_cleanup(){
-    cd $cur_dir
-    rm -f manyuser.zip
-    rm -rf shadowsocks-manyuser
-    rm -f libsodium-1.0.8.tar.gz
-    rm -rf libsodium-1.0.8
+install_cleanup(){
+    cd ${cur_dir}
+    rm -rf manyuser.zip shadowsocksr-manyuser libsodium-1.0.13.tar.gz libsodium-1.0.13
 }
 
 
 # Uninstall ShadowsocksR
-function uninstall_shadowsocks(){
-    printf "Are you sure uninstall ShadowsocksR? (y/n) "
+uninstall_shadowsocksr(){
+    printf "Are you sure uninstall ShadowsocksR? (y/n)"
     printf "\n"
     read -p "(Default: n):" answer
-    if [ -z $answer ]; then
-        answer="n"
-    fi
-    if [ "$answer" = "y" ]; then
+    [ -z ${answer} ] && answer="n"
+    if [ "${answer}" == "y" ] || [ "${answer}" == "Y" ]; then
         /etc/init.d/shadowsocks status > /dev/null 2>&1
         if [ $? -eq 0 ]; then
             /etc/init.d/shadowsocks stop
         fi
-        checkos
-        if [ "$OS" == 'CentOS' ]; then
+        if check_sys packageManager yum; then
             chkconfig --del shadowsocks
-        else
+        elif check_sys packageManager apt; then
             update-rc.d -f shadowsocks remove
         fi
         rm -f /etc/shadowsocks.json
         rm -f /etc/init.d/shadowsocks
+        rm -f /var/log/shadowsocks.log
         rm -rf /usr/local/shadowsocks
         echo "ShadowsocksR uninstall success!"
     else
-        echo "uninstall cancelled, Nothing to do"
+        echo
+        echo "uninstall cancelled, nothing to do..."
+        echo
     fi
 }
 
 # Install ShadowsocksR
-function install_shadowsocks(){
-    checkos
-    rootness
+install_shadowsocksr(){
     disable_selinux
     pre_install
     download_files
     config_shadowsocks
-    install_ss
+    if check_sys packageManager yum; then
+        firewall_set
+    fi
+    install
     install_cleanup
 }
 
 # Initialization step
 action=$1
-[  -z $1 ] && action=install
+[ -z $1 ] && action=install
 case "$action" in
-install)
-    install_shadowsocks
-    ;;
-uninstall)
-    uninstall_shadowsocks
-    ;;
-*)
-    echo "Arguments error! [${action} ]"
-    echo "Usage: `basename $0` {install|uninstall}"
-    ;;
-esac
+    install|uninstall)
+        ${action}_shadowsocksr
+        ;;
+    *)
+        echo "Arguments error! [${action}]"
+        echo "Usage: `basename $0` [install|uninstall]"
+        ;;
+esac
\ No newline at end of file