diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e43b0f9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.DS_Store
diff --git a/README.md b/README.md
index 01003ad..2661056 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,73 @@
-# shell-scripts
-Linux Shell Scripts
+# Linux Shell Scripts
+
+一些 Linux 脚本
+
+```sh
+$ tree
+├── kcptun
+│   └── kcptun.sh # kcptun 一键安装脚本
+└── ovz-bbr
+    └── ovz-bbr-installer.sh # OpenVZ BBR 一键安装脚本
+```
+
+## Kcptun 一键安装脚本
+
+* Ubuntu：
+```sh
+apt install python-is-python3 -y
+wget --no-check-certificate -O kcptun.sh https://github.com/kuoruan/shell-scripts/raw/master/kcptun/kcptun.sh
+sh kcptun.sh
+```
+
+
+* 其他Linux安装命令：
+```sh
+wget --no-check-certificate -O kcptun.sh https://github.com/kuoruan/shell-scripts/raw/master/kcptun/kcptun.sh
+sh kcptun.sh
+```
+
+* 帮助信息
+
+```sh
+# sh kcptun.sh help
+请使用: kcptun.sh <option>
+
+可使用的参数 <option> 包括:
+
+    install          安装
+    uninstall        卸载
+    update           检查更新
+    manual           自定义 Kcptun 版本安装
+    help             查看脚本使用说明
+    add              添加一个实例, 多端口加速
+    reconfig <id>    重新配置实例
+    show <id>        显示实例详细配置
+    log <id>         显示实例日志
+    del <id>         删除一个实例
+
+注: 上述参数中的 <id> 可选, 代表的是实例的ID
+    可使用 1, 2, 3 ... 分别对应实例 kcptun, kcptun2, kcptun3 ...
+    若不指定 <id>, 则默认为 1
+
+Supervisor 命令:
+    service supervisord {start|stop|restart|status}
+                        {启动|关闭|重启|查看状态}
+Kcptun 相关命令:
+    supervisorctl {start|stop|restart|status} kcptun<id>
+                  {启动|关闭|重启|查看状态}
+```
+
+## OpenVZ BBR 一键安装脚本
+
+* 安装命令：
+
+```sh
+wget --no-check-certificate -O ovz-bbr-installer.sh https://github.com/kuoruan/shell-scripts/raw/master/ovz-bbr/ovz-bbr-installer.sh
+sh ovz-bbr-installer.sh
+```
+
+* 卸载命令
+
+```sh
+sh ovz-bbr-installer.sh uninstall
+```
diff --git a/kcptun/bin/jq-linux32 b/kcptun/bin/jq-linux32
deleted file mode 100755
index 2fb9cca..0000000
Binary files a/kcptun/bin/jq-linux32 and /dev/null differ
diff --git a/kcptun/bin/jq-linux64 b/kcptun/bin/jq-linux64
deleted file mode 100755
index 939227e..0000000
Binary files a/kcptun/bin/jq-linux64 and /dev/null differ
diff --git a/kcptun/kcptun.sh b/kcptun/kcptun.sh
index 3642441..a2062bd 100755
--- a/kcptun/kcptun.sh
+++ b/kcptun/kcptun.sh
@@ -1,7 +1,7 @@
-#!/bin/bash
+#!/bin/sh
 
 : <<-'EOF'
-Copyright 2017 Xingwang Liao <kuoruan@gmail.com>
+Copyright 2017-2019 Xingwang Liao <kuoruan@gmail.com>
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
@@ -17,8 +17,8 @@ export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 
 # 版本信息，请勿修改
 # =================
-SHELL_VERSION=20
-CONFIG_VERSION=6
+SHELL_VERSION=26
+CONFIG_VERSION=7
 INIT_VERSION=3
 # =================
 
@@ -31,10 +31,11 @@ KCPTUN_TAGS_URL='https://github.com/xtaci/kcptun/tags'
 BASE_URL='https://github.com/kuoruan/shell-scripts/raw/master/kcptun'
 SHELL_VERSION_INFO_URL="${BASE_URL}/version.json"
 
-JQ_LINUX32_URL="${BASE_URL}/bin/jq-linux32"
-JQ_LINUX64_URL="${BASE_URL}/bin/jq-linux64"
-JQ_LINUX32_HASH='5ac55877f41916b80fe546e16d58678cca9aae6d'
-JQ_LINUX64_HASH='d8e36831c3c94bb58be34dd544f44a6c6cb88568'
+JQ_DOWNLOAD_URL="https://github.com/stedolan/jq/releases/download/jq-1.5/"
+JQ_LINUX32_URL="${JQ_DOWNLOAD_URL}/jq-linux32"
+JQ_LINUX64_URL="${JQ_DOWNLOAD_URL}/jq-linux64"
+JQ_LINUX32_HASH='ab440affb9e3f546cf0d794c0058543eeac920b0cd5dff660a2948b970beb632'
+JQ_LINUX64_HASH='c6b3a7d7d3e7b70c6f51b706a3b90bd01833846c54d32ca32f0027f00226ff6d'
 JQ_BIN="${KCPTUN_INSTALL_DIR}/bin/jq"
 
 SUPERVISOR_SERVICE_FILE_DEBIAN_URL="${BASE_URL}/startup/supervisord.init.debain"
@@ -55,8 +56,9 @@ D_RCVWND=512
 D_DATASHARD=10
 D_PARITYSHARD=3
 D_DSCP=0
-D_NOCOMP='false'
+D_NOCOMP='true'
 D_QUIET='false'
+D_TCP='false'
 D_SNMPPERIOD=60
 D_PPROF='false'
 
@@ -66,12 +68,18 @@ D_NODELAY=1
 D_INTERVAL=20
 D_RESEND=2
 D_NC=1
-D_SOCKBUF=4194304
+# SMUX提高到64M提高SreamBuf效果
+D_SOCKBUF=67108868
+D_SMUXBUF=67108868
 D_KEEPALIVE=10
+
+# KCP新版支持，SMux默认为2，BUF大小改为16M
+D_SMUXVER=2
+D_STREAMBUF=16777217
 # ======================
 
 # 当前选择的实例 ID
-current_instance_id=
+current_instance_id=""
 run_user='kcptun'
 
 clear
@@ -88,6 +96,7 @@ cat >&1 <<-'EOF'
 #########################################################
 EOF
 
+# 打印帮助信息
 usage() {
 	cat >&1 <<-EOF
 
@@ -121,17 +130,20 @@ usage() {
 	exit $1
 }
 
+# 判断命令是否存在
 command_exists() {
 	command -v "$@" >/dev/null 2>&1
 }
 
+# 判断输入内容是否为数字
 is_number() {
-	expr $1 + 1 >/dev/null 2>&1
+	expr "$1" + 1 >/dev/null 2>&1
 }
 
+# 按任意键继续
 any_key_to_continue() {
 	echo "请按任意键继续或 Ctrl + C 退出"
-	local saved=
+	local saved=""
 	saved="$(stty -g)"
 	stty -echo
 	stty cbreak
@@ -141,8 +153,15 @@ any_key_to_continue() {
 	stty $saved
 }
 
+first_character() {
+	if [ -n "$1" ]; then
+		echo "$1" | cut -c1
+	fi
+}
+
+# 检查是否具有 root 权限
 check_root() {
-	local user=
+	local user=""
 	user="$(id -un 2>/dev/null || true)"
 	if [ "$user" != "root" ]; then
 		cat >&2 <<-'EOF'
@@ -154,8 +173,8 @@ check_root() {
 
 # 获取服务器的IP地址
 get_server_ip() {
-	local server_ip=
-	local interface_info=
+	local server_ip=""
+	local interface_info=""
 
 	if command_exists ip; then
 		interface_info="$(ip addr)"
@@ -168,8 +187,9 @@ get_server_ip() {
 		grep -vE "^192\.168|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-2]\.|^10\.|^127\.|^255\.|^0\." | \
 		head -n 1)
 
+	# 自动获取失败时，通过网站提供的 API 获取外网地址
 	if [ -z "$server_ip" ]; then
-		 server_ip="$(wget -qO- ipv4.icanhazip.com)"
+		 server_ip="$(wget -qO- --no-check-certificate https://ipv4.icanhazip.com)"
 	fi
 
 	echo "$server_ip"
@@ -186,38 +206,26 @@ disable_selinux() {
 	fi
 }
 
+# 获取当前操作系统信息
 get_os_info() {
-	lsb_dist=''
-	dist_version=''
+	lsb_dist=""
+	dist_version=""
 	if command_exists lsb_release; then
 		lsb_dist="$(lsb_release -si)"
 	fi
 
-	if [ -z "$lsb_dist" ] && [ -r /etc/lsb-release ]; then
-		lsb_dist="$(. /etc/lsb-release && echo "$DISTRIB_ID")"
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/debian_version ]; then
-		lsb_dist='debian'
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/fedora-release ]; then
-		lsb_dist='fedora'
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/oracle-release ]; then
-		lsb_dist='oracleserver'
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/centos-release ]; then
-		lsb_dist='centos'
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/redhat-release ]; then
-		lsb_dist='redhat'
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/photon-release ]; then
-		lsb_dist='photon'
-	fi
-	if [ -z "$lsb_dist" ] && [ -r /etc/os-release ]; then
-		lsb_dist="$(. /etc/os-release && echo "$ID")"
+	if [ -z "$lsb_dist" ]; then
+		[ -r /etc/lsb-release ] && lsb_dist="$(. /etc/lsb-release && echo "$DISTRIB_ID")"
+		[ -r /etc/debian_version ] && lsb_dist='debian'
+		[ -r /etc/fedora-release ] && lsb_dist='fedora'
+		[ -r /etc/oracle-release ] && lsb_dist='oracleserver'
+		[ -r /etc/centos-release ] && lsb_dist='centos'
+		[ -r /etc/redhat-release ] && lsb_dist='redhat'
+		[ -r /etc/photon-release ] && lsb_dist='photon'
+		[ -r /etc/os-release ] && lsb_dist="$(. /etc/os-release && echo "$ID")"
 	fi
 
+
 	lsb_dist="$(echo "$lsb_dist" | tr '[:upper:]' '[:lower:]')"
 
 	if [ "${lsb_dist}" = "redhatenterpriseserver" ]; then
@@ -282,8 +290,9 @@ get_os_info() {
 	fi
 }
 
+# 获取服务器架构和 Kcptun 服务端文件后缀名
 get_arch() {
-	architecture=$(uname -m)
+	architecture="$(uname -m)"
 	case "$architecture" in
 		amd64|x86_64)
 			spruce_type='linux-amd64'
@@ -303,11 +312,12 @@ get_arch() {
 	esac
 }
 
+# 获取 API 内容
 get_content() {
 	local url="$1"
 	local retry=0
 
-	local content=
+	local content=""
 	get_network_content() {
 		if [ $retry -ge 3 ]; then
 			cat >&2 <<-EOF
@@ -319,7 +329,8 @@ get_content() {
 			exit 1
 		fi
 
-		content="$(wget -qO- --no-check-certificate "$url")"
+		# 将所有的换行符替换为自定义标签，防止 jq 解析失败
+		content="$(wget -qO- --no-check-certificate "$url" | sed -r 's/(\\r)?\\n/#br#/g')"
 
 		if [ "$?" != "0" ] || [ -z "$content" ]; then
 			retry=$(expr $retry + 1)
@@ -331,12 +342,13 @@ get_content() {
 	echo "$content"
 }
 
+# 下载文件， 默认重试 3 次
 download_file() {
 	local url="$1"
 	local file="$2"
 	local verify="$3"
 	local retry=0
-	local verify_cmd=
+	local verify_cmd=""
 
 	verify_file() {
 		if [ -z "$verify_cmd" ] && [ -n "$verify" ]; then
@@ -351,7 +363,7 @@ download_file() {
 			fi
 
 			if [ -n "$verify_cmd" ] && ! command_exists "$verify_cmd"; then
-				verify_cmd=
+				verify_cmd=""
 			fi
 		fi
 
@@ -402,6 +414,10 @@ download_file() {
 	download_file_to_path
 }
 
+# 安装 jq 用于解析和生成 json 文件
+# jq 已进入大部分 Linux 发行版的软件仓库，
+#  	URL: https://stedolan.github.io/jq/download/
+# 但为了防止有些系统安装失败，还是通过脚本来提供了。
 install_jq() {
 	check_jq() {
 		if [ ! -f "$JQ_BIN" ]; then
@@ -411,7 +427,7 @@ install_jq() {
 		[ ! -x "$JQ_BIN" ] && chmod a+x "$JQ_BIN"
 
 		if ( $JQ_BIN --help 2>/dev/null | grep -q "JSON" ); then
-			is_checkd_jq="true"
+			is_checked_jq="true"
 			return 0
 		else
 			rm -f "$JQ_BIN"
@@ -419,8 +435,8 @@ install_jq() {
 		fi
 	}
 
-	if [ -z "$is_checkd_jq" ] && ! check_jq; then
-		local dir=
+	if [ -z "$is_checked_jq" ] && ! check_jq; then
+		local dir=""
 		dir="$(dirname "$JQ_BIN")"
 		if [ ! -d "$dir" ]; then
 			(
@@ -449,11 +465,11 @@ install_jq() {
 			exit 1
 		fi
 
-
 		return 0
 	fi
 }
 
+# 读取 json 文件中某一项的值
 get_json_string() {
 	install_jq
 
@@ -461,7 +477,7 @@ get_json_string() {
 	local selector="$2"
 	local regex="$3"
 
-	local str=
+	local str=""
 	if [ -n "$content" ]; then
 		str="$(echo "$content" | $JQ_BIN -r "$selector" 2>/dev/null)"
 
@@ -472,6 +488,11 @@ get_json_string() {
 	echo "$str"
 }
 
+# 获取当前实例的配置文件路径，传入参数：
+# * config: kcptun 服务端配置文件
+# * log: kcptun 日志文件路径
+# * snmp: kcptun snmp 日志文件路径
+# * supervisor: 实例的 supervisor 文件路径
 get_current_file() {
 	case "$1" in
 		config)
@@ -498,14 +519,17 @@ get_instance_count() {
 	fi
 }
 
+# 通过 API 获取对应版本号 Kcptun 的 release 信息
+# 传入 Kcptun 版本号
 get_kcptun_version_info() {
-	local request_version=$1
+	local request_version="$1"
 
-	local version_content=
+	local version_content=""
 	if [ -n "$request_version" ]; then
-		local json_content=
+		local json_content=""
 		json_content="$(get_content "$KCPTUN_RELEASES_URL")"
-		version_content="$(get_json_string "$json_content" ".[] | select(.tag_name == \"${request_version}\")")"
+		local version_selector=".[] | select(.tag_name == \"${request_version}\")"
+		version_content="$(get_json_string "$json_content" "$version_selector")"
 	else
 		version_content="$(get_content "$KCPTUN_LATEST_RELEASE_URL")"
 	fi
@@ -518,7 +542,8 @@ get_kcptun_version_info() {
 		get_arch
 	fi
 
-	kcptun_release_download_url="$(get_json_string "$version_content" ".assets[] | select(.name | contains(\"$spruce_type\")) | .browser_download_url")"
+	local url_selector=".assets[] | select(.name | contains(\"${spruce_type}\")) | .browser_download_url"
+	kcptun_release_download_url="$(get_json_string "$version_content" "$url_selector")"
 
 	if [ -z "$kcptun_release_download_url" ]; then
 		return 1
@@ -530,18 +555,18 @@ get_kcptun_version_info() {
 	kcptun_release_publish_time="$(get_json_string "$version_content" '.published_at')"
 	kcptun_release_html_url="$(get_json_string "$version_content" '.html_url')"
 
-	local body=
-	body="$(get_json_string "$version_content" '.body' | grep -vE '(^```)|(^>)|(^[[:space:]]*$)')"
+	local body_content="$(get_json_string "$version_content" '.body')"
+	local body="$(echo "$body_content" | sed 's/#br#/\n/g' | grep -vE '(^```)|(^>)|(^[[:space:]]*$)|(SUM$)')"
 
 	kcptun_release_body="$(echo "$body" | grep -vE "[0-9a-zA-Z]{32,}")"
 
-	local file_verify=
+	local file_verify=""
 	file_verify="$(echo "$body" | grep "$spruce_type")"
 
 	if [ -n "$file_verify" ]; then
-		local i=1
-		local split=
-		while :
+		local i="1"
+		local split=""
+		while true
 		do
 			split="$(echo "$file_verify" | cut -d ' ' -f$i)"
 
@@ -559,27 +584,41 @@ get_kcptun_version_info() {
 	return 0
 }
 
+# 获取脚本版本信息
 get_shell_version_info() {
-	local shell_version_content=
+	local shell_version_content=""
 	shell_version_content="$(get_content "$SHELL_VERSION_INFO_URL")"
 	if [ -z "$shell_version_content" ]; then
 		return 1
 	fi
 
-	new_shell_version="$(get_json_string "$shell_version_content" '.shell_version' '[0-9]+' || "0")"
-	new_config_version="$(get_json_string "$shell_version_content" '.config_version' '[0-9]+' || "0")"
-	new_init_version="$(get_json_string "$shell_version_content" '.init_version' '[0-9]+' || "0")"
+	new_shell_version="$(get_json_string "$shell_version_content" '.shell_version' '[0-9]+')"
+	new_config_version="$(get_json_string "$shell_version_content" '.config_version' '[0-9]+')"
+	new_init_version="$(get_json_string "$shell_version_content" '.init_version' '[0-9]+')"
+
 	shell_change_log="$(get_json_string "$shell_version_content" '.change_log')"
 	config_change_log="$(get_json_string "$shell_version_content" '.config_change_log')"
 	init_change_log="$(get_json_string "$shell_version_content" '.init_change_log')"
 	new_shell_url="$(get_json_string "$shell_version_content" '.shell_url')"
 
+
+	if [ -z "$new_shell_version" ]; then
+		new_shell_version="0"
+	fi
+	if [ -z "$new_config_version" ]; then
+		new_config_version="0"
+	fi
+	if [ -z "$new_init_version" ]; then
+		new_init_version="0"
+	fi
+
 	return 0
 }
 
+# 下载并安装 Kcptun
 install_kcptun() {
 	if [ -z "$kcptun_release_download_url" ]; then
-		get_kcptun_version_info $1
+		get_kcptun_version_info "$1"
 
 		if [ "$?" != "0" ]; then
 			cat >&2 <<-'EOF'
@@ -615,7 +654,7 @@ install_kcptun() {
 		sleep 3
 	)
 
-	local kcptun_server_file=
+	local kcptun_server_file=""
 	kcptun_server_file="$(get_kcptun_server_file)"
 
 	if [ ! -f "$kcptun_server_file" ]; then
@@ -640,6 +679,7 @@ install_kcptun() {
 	rm -f "$kcptun_file_name" "${KCPTUN_INSTALL_DIR}/client_$file_suffix"
 }
 
+# 安装依赖软件
 install_deps() {
 	if [ -z "$lsb_dist" ]; then
 		get_os_info
@@ -647,7 +687,7 @@ install_deps() {
 
 	case "$lsb_dist" in
 		ubuntu|debian|raspbian)
-			local did_apt_get_update=
+			local did_apt_get_update=""
 			apt_get_update() {
 				if [ -z "$did_apt_get_update" ]; then
 					( set -x; sleep 3; apt-get update )
@@ -670,9 +710,14 @@ install_deps() {
 				( set -x; sleep 3; apt-get install -y -q tar )
 			fi
 
-			if ! command_exists easy_install; then
+			if ! command_exists pip; then
 				apt_get_update
-				( set -x; sleep 3; apt-get install -y -q python-setuptools )
+				( set -x; sleep 3; apt-get install -y -q python-pip || true )
+			fi
+
+			if ! command_exists python; then
+				apt_get_update
+				( set -x; sleep 3; apt-get install -y -q python )
 			fi
 			;;
 		fedora|centos|redhat|oraclelinux|photon)
@@ -689,8 +734,12 @@ install_deps() {
 					( set -x; sleep 3; dnf -y -q install tar )
 				fi
 
-				if ! command_exists easy_install; then
-					( set -x; sleep 3; dnf -y -q install python-setuptools )
+				if ! command_exists pip; then
+					( set -x; sleep 3; dnf -y -q install python-pip || true )
+				fi
+
+				if ! command_exists python; then
+					( set -x; sleep 3; dnf -y -q install python )
 				fi
 			elif [ "$lsb_dist" = "photon" ]; then
 				if ! command_exists wget; then
@@ -705,8 +754,12 @@ install_deps() {
 					( set -x; sleep 3; tdnf -y install tar )
 				fi
 
-				if ! command_exists easy_install; then
-					( set -x; sleep 3; tdnf -y install python-setuptools )
+				if ! command_exists pip; then
+					( set -x; sleep 3; tdnf -y install python-pip || true )
+				fi
+
+				if ! command_exists python; then
+					( set -x; sleep 3; tdnf -y install python )
 				fi
 			else
 				if ! command_exists wget; then
@@ -721,8 +774,15 @@ install_deps() {
 					( set -x; sleep 3; yum -y -q install tar )
 				fi
 
-				if ! command_exists easy_install; then
-					( set -x; sleep 3; yum -y -q install python-setuptools )
+				# CentOS 等红帽系操作系统的软件库中可能不包括 python-pip
+				# 可以先安装 epel-release
+				if ! command_exists pip; then
+					( set -x; sleep 3; yum -y -q install python-pip || true )
+				fi
+
+				# 如果 python-pip 安装失败，检测是否已安装 python 环境
+				if ! command_exists python; then
+					( set -x; sleep 3; yum -y -q install python )
 				fi
 			fi
 			;;
@@ -735,18 +795,20 @@ install_deps() {
 			;;
 	esac
 
+	# 这里判断了是否存在安装失败的软件包，但是默认不处理 python-pip 的安装失败，
+	# 接下来会统一检测并再次安装 pip 命令
 	if [ "$?" != 0 ]; then
 		cat >&2 <<-'EOF'
 		一些依赖软件安装失败，
 		请查看日志检查错误。
 		EOF
-
 		exit 1
 	fi
 
 	install_jq
 }
 
+# 安装 supervisor
 install_supervisor() {
 	if [ -s /etc/supervisord.conf ] && command_exists supervisord; then
 		cat >&2 <<-EOF
@@ -762,39 +824,145 @@ install_supervisor() {
 		exit 1
 	fi
 
-	if ! command_exists easy_install; then
+	if ! command_exists python; then
+		cat >&2 <<-'EOF'
+		python 环境未安装，并且自动安装失败，请手动安装 python 环境。
+		EOF
+
+		exit 1
+	fi
+
+	local python_version="$(python -V 2>&1)"
+
+	if [ "$?" != "0" ] || [ -z "$python_version" ]; then
+		cat >&2 <<-'EOF'
+		python 环境已损坏，无法通过 python -V 来获取版本号。
+		请手动重装 python 环境。
+		EOF
+
+		exit 1
+	fi
+
+	local version_string="$(echo "$python_version" | cut -d' ' -f2 | head -n1)"
+	local major_version="$(echo "$version_string" | cut -d'.' -f1)"
+	local minor_version="$(echo "$version_string" | cut -d'.' -f2)"
+
+	if [ -z "$major_version" ] || [ -z "$minor_version" ] || \
+		! ( is_number "$major_version" ); then
 		cat >&2 <<-EOF
-		未找到已安装的 easy_install 命令，
-		请先手动安装 python-setuptools
-		然后重新运行安装脚本。
+		获取 python 大小版本号失败：${python_version}
 		EOF
+
 		exit 1
 	fi
 
-	if ! ( easy_install --help >/dev/null 2>&1 ); then
+	local is_python_26="false"
+
+	if [ "$major_version" -lt "2" ] || ( \
+		[ "$major_version" = "2" ] && [ "$minor_version" -lt "6" ] ); then
 		cat >&2 <<-EOF
-		检测到你的 easy_install 已损坏，
-		通常是由于你自己升级过 python 版本，
-		但是没有将 easy_install 链接到新的地址。
-		需要手动做一个软链接
-		 * ln -s /usr/local/python2.7/bin/easy_install /usr/bin/easy_install
+		不支持的 python 版本 ${version_string}，当前仅支持 python 2.6 及以上版本的安装。
+		EOF
+
+		exit 1
+	elif [ "$major_version" = "2" ] && [ "$minor_version" = "6" ]; then
+		is_python_26="true"
 
-		 "/usr/local/python2.7" 应该为你新版本 python 的路径
+		cat >&1 <<-EOF
+		注意：当前服务器的 python 版本为 ${version_string},
+		脚本对 python 2.6 及以下版本的支持可能会失效，
+		请尽快升级 python 版本到 >= 2.7.9 或 >= 3.4。
+		EOF
+
+		any_key_to_continue
+	fi
+
+	if ! command_exists pip; then
+		# 如果没有监测到 pip 命令，但当前服务器已经安装 python
+		# 使用 get-pip.py 脚本来安装 pip 命令
+		if [ "$is_python_26" = "true" ]; then
+			(
+				set -x
+				wget -qO- --no-check-certificate https://bootstrap.pypa.io/2.6/get-pip.py | python
+			)
+		else
+			(
+				set -x
+				wget -qO- --no-check-certificate https://bootstrap.pypa.io/get-pip.py | python
+			)
+		fi
+	fi
+
+	# 如果使用脚本安装依然失败，提示手动安装
+	if ! command_exists pip; then
+		cat >&2 <<-EOF
+		未找到已安装的 pip 命令，请先手动安装 python-pip
+		本脚本自 v21 版开始使用 pip 来安装 Supervisior。
+
+		1. 对于 Debian 系的 Linux 系统，可以尝试使用：
+		  sudo apt-get install -y python-pip 来进行安装
+
+		2. 对于 Redhat 系的 Linux 系统，可以尝试使用：
+		  sudo yum install -y python-pip 来进行安装
+		  * 如果提示未找到，可以先尝试安装：epel-release 扩展软件库
+
+		3. 如果以上方法都失败了，请使用以下命令来手动安装：
+		  wget -qO- --no-check-certificate https://bootstrap.pypa.io/get-pip.py | python
+		  * python 2.6 的用户请使用：
+		    wget -qO- --no-check-certificate https://bootstrap.pypa.io/2.6/get-pip.py | python
+
+		4. pip 安装完毕之后，先运行一下更新命令：
+		  pip install --upgrade pip
+
+		  再检查一下 pip 的版本：
+		  pip -V
+
+		一切无误后，请重新运行安装脚本。
 		EOF
 		exit 1
 	fi
 
-	(
-		set -x
-		easy_install -i https://pypi.python.org/simple/ -U supervisor
-	)
+	if ! ( pip --version >/dev/null 2>&1 ); then
+		cat >&2 <<-EOF
+		检测到当前环境的 pip 命令已损坏，
+		请检查你的 python 环境。
+		EOF
+
+		exit 1
+	fi
+
+	if [ "$is_python_26" != "true" ]; then
+		# 已安装 pip 时先尝试更新一下，
+		# 如果是 python 2.6，就不要更新了，更新会导致 pip 损坏
+		# pip 只支持 python 2 >= 2.7.9
+		# https://pip.pypa.io/en/stable/installing/
+		(
+			set -x
+			pip install --upgrade pip || true
+		)
+	fi
+
+	if [ "$is_python_26" = "true" ]; then
+		(
+			set -x
+			pip install 'supervisor>=3.0.0,<4.0.0'
+		)
+	else
+		(
+			set -x
+			pip install --upgrade supervisor
+		)
+	fi
 
 	if [ "$?" != "0" ]; then
 		cat >&2 <<-EOF
 		错误: 安装 Supervisor 失败，
 		请尝试使用
-		  easy_install -i https://pypi.python.org/simple/ -U supervisor
+		  pip install supervisor
 		来手动安装。
+		Supervisor 从 4.0 开始已不支持 python 2.6 及以下版本
+		python 2.6 的用户请使用：
+		  pip install 'supervisor>=3.0.0,<4.0.0'
 		EOF
 
 		exit 1
@@ -828,6 +996,8 @@ install_supervisor() {
 
 	local cfg_file='/etc/supervisor/supervisord.conf'
 
+	local rvt="0"
+
 	if [ ! -s "$cfg_file" ]; then
 		if ! command_exists echo_supervisord_conf; then
 			cat >&2 <<-'EOF'
@@ -839,15 +1009,49 @@ install_supervisor() {
 
 		(
 			set -x
-			echo_supervisord_conf >"$cfg_file" 2>/dev/null
+			echo_supervisord_conf >"$cfg_file" 2>&1
 		)
+		rvt="$?"
+	fi
 
-		if [ "$?" != "0" ]; then
-			echo "创建 Supervisor 配置文件失败!"
-			exit 1
+	local cfg_content="$(cat "$cfg_file")"
+
+	# Error with supervisor config file
+	if ( echo "$cfg_content" | grep -q "Traceback (most recent call last)" ) ; then
+		rvt="1"
+
+		if ( echo "$cfg_content" | grep -q "DistributionNotFound: meld3" ); then
+			# https://github.com/Supervisor/meld3/issues/23
+			(
+				set -x
+				local temp="$(mktemp -d)"
+				local pwd="$(pwd)"
+
+				download_file 'https://pypi.python.org/packages/source/m/meld3/meld3-1.0.2.tar.gz' \
+					"$temp/meld3.tar.gz"
+
+				cd "$temp"
+				tar -zxf "$temp/meld3.tar.gz" --strip=1
+				python setup.py install
+				cd "$pwd"
+			)
+
+			if [ "$?" = "0" ] ; then
+				(
+					set -x
+					echo_supervisord_conf >"$cfg_file" 2>/dev/null
+				)
+				rvt="$?"
+			fi
 		fi
 	fi
 
+	if [ "$rvt" != "0" ]; then
+		rm -f "$cfg_file"
+		echo "创建 Supervisor 配置文件失败!"
+		exit 1
+	fi
+
 	if ! grep -q '^files[[:space:]]*=[[:space:]]*/etc/supervisor/conf.d/\*\.conf$' "$cfg_file"; then
 		if grep -q '^\[include\]$' "$cfg_file"; then
 			sed -i '/^\[include\]$/a files = \/etc\/supervisor\/conf.d\/\*\.conf' "$cfg_file"
@@ -860,16 +1064,22 @@ install_supervisor() {
 }
 
 download_startup_file() {
-	local supervisor_startup_file=
-	local supervisor_startup_file_url=
+	local supervisor_startup_file=""
+	local supervisor_startup_file_url=""
 
 	if command_exists systemctl; then
-		supervisor_startup_file='/lib/systemd/system/supervisord.service'
+		supervisor_startup_file="/etc/systemd/system/supervisord.service"
 		supervisor_startup_file_url="$SUPERVISOR_SYSTEMD_FILE_URL"
 
 		download_file "$supervisor_startup_file_url" "$supervisor_startup_file"
 		(
 			set -x
+			# 删除旧版 service 文件
+
+			local old_service_file="/lib/systemd/system/supervisord.service"
+			if [ -f "$old_service_file" ]; then
+				rm -f "$old_service_file"
+			fi
 			systemctl daemon-reload >/dev/null 2>&1
 		)
 	elif command_exists service; then
@@ -963,18 +1173,18 @@ enable_supervisor() {
 
 set_kcptun_config() {
 	is_port() {
-		local port=$1
+		local port="$1"
 		is_number "$port" && \
 			[ $port -ge 1 ] && [ $port -le 65535 ]
 	}
 
 	port_using() {
-		local port=$1
+		local port="$1"
 
 		if command_exists netstat; then
-			( netstat -ntul | grep -qE "[0-9:]:${port}\s" )
+			( netstat -ntul | grep -qE "[0-9:*]:${port}\s" )
 		elif command_exists ss; then
-			( ss -ntul | grep -qE "[0-9:]:${port}\s" )
+			( ss -ntul | grep -qE "[0-9:*]:${port}\s" )
 		else
 			return 0
 		fi
@@ -982,36 +1192,73 @@ set_kcptun_config() {
 		return $?
 	}
 
-	local input=
-	local yn=
+	local input=""
+	local yn=""
 
 	# 设置服务运行端口
 	[ -z "$listen_port" ] && listen_port="$D_LISTEN_PORT"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请输入 Kcptun 服务端运行端口 [1~65535]
 		这个端口就是 Kcptun 客户端连接的端口
+		新版支持端口范围，可输入[30000-35000]来开启端口范围
 		EOF
 		read -p "(默认: ${listen_port}): " input
+
 		if [ -n "$input" ]; then
-			if is_port "$input"; then
-				listen_port="$input"
+			if echo "$input" | grep -qE '^[0-9]+-[0-9]+$'; then
+				range_start=$(echo "$input" | cut -d'-' -f1)
+				range_end=$(echo "$input" | cut -d'-' -f2)
+
+				if [ "$range_start" -ge 1 ] && [ "$range_start" -le 65535 ] && \
+					[ "$range_end" -ge 1 ] && [ "$range_end" -le 65535 ] && \
+					[ "$range_start" -le "$range_end" ]; then
+					if echo "$current_listen_port" | grep -qE '^[0-9]+-[0-9]+$'; then
+						current_range_start=$(echo "$current_listen_port" | cut -d'-' -f1)
+						current_range_end=$(echo "$current_listen_port" | cut -d'-' -f2)
+
+						if [ "$range_start" -le "$current_range_end" ] && [ "$range_end" -ge "$current_range_start" ]; then
+							listen_port="$input"
+						else
+							echo "当前监听端口范围不在输入的范围内, 请重新输入!当前范围：${current_listen_port}"
+							continue
+						fi
+					else
+						listen_port="$input"
+					fi
+				else
+					echo "端口范围无效, 请输入类似 3000-5000 的有效端口范围!"
+					continue
+				fi
+			elif is_port "$input"; then
+				if echo "$current_listen_port" | grep -qE '^[0-9]+-[0-9]+$'; then
+					current_range_start=$(echo "$current_listen_port" | cut -d'-' -f1)
+					current_range_end=$(echo "$current_listen_port" | cut -d'-' -f2)
+
+					if [ "$input" -ge "$current_range_start" ] && [ "$input" -le "$current_range_end" ]; then
+						listen_port="$input"
+					else
+						echo "输入的端口不在当前监听端口范围内, 请重新输入!当前范围：${current_listen_port}"
+						continue
+					fi
+				else
+					listen_port="$input"
+				fi
 			else
-				echo "输入有误, 请输入 1~65535 之间的数字!"
+				echo "输入有误, 请输入 1~65535 之间的数字或有效的端口范围!"
 				continue
 			fi
 		fi
 
-		if port_using "$listen_port" && \
-			[ "$listen_port" != "$current_listen_port" ]; then
+		if port_using "$listen_port" && [ "$listen_port" != "$current_listen_port" ]; then
 			echo "端口已被占用, 请重新输入!"
 			continue
 		fi
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	端口 = ${listen_port}
@@ -1028,7 +1275,7 @@ set_kcptun_config() {
 		target_addr="$input"
 	fi
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	加速地址 = ${target_addr}
@@ -1036,7 +1283,7 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$target_port" ] && target_port="$D_TARGET_PORT"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请输入需要加速的端口 [1~65535]
@@ -1059,7 +1306,7 @@ set_kcptun_config() {
 		if [ "$target_addr" = "127.0.0.1" ] && ! port_using "$target_port"; then
 			read -p "当前没有软件使用此端口, 确定加速此端口? [y/n]: " yn
 			if [ -n "$yn" ]; then
-				case "${yn:0:1}" in
+				case "$(first_character "$yn")" in
 					y|Y)
 						;;
 					*)
@@ -1072,8 +1319,8 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
-	yn=
+	input=""
+	yn=""
 	cat >&1 <<-EOF
 	---------------------------
 	加速端口 = ${target_port}
@@ -1088,7 +1335,7 @@ set_kcptun_config() {
 	read -p "(默认密码: ${key}): " input
 	[ -n "$input" ] && key="$input"
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	密码 = ${key}
@@ -1105,7 +1352,7 @@ set_kcptun_config() {
 	请尽量选择弱加密或者不加密。
 	该参数必须两端一致
 	EOF
-	while :
+	while true
 	do
 
 		for c in $crypt_list; do
@@ -1126,7 +1373,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	i=0
 	cat >&1 <<-EOF
 	-----------------------------
@@ -1143,7 +1390,7 @@ set_kcptun_config() {
 	如果加速模式选择“手动(manual)”，
 	将进入手动档隐藏参数的设置。
 	EOF
-	while :
+	while true
 	do
 
 		for m in $mode_list; do
@@ -1164,7 +1411,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	i=0
 	cat >&1 <<-EOF
 	---------------------------
@@ -1175,14 +1422,14 @@ set_kcptun_config() {
 	if [ "$mode" = "manual" ]; then
 		set_manual_parameters
 	else
-		nodelay=
-		interval=
-		resend=
-		nc=
+		nodelay=""
+		interval=""
+		resend=""
+		nc=""
 	fi
 
 	[ -z "$mtu" ] && mtu="$D_MTU"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置 UDP 数据包的 MTU (最大传输单元)值
@@ -1199,7 +1446,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	MTU = ${mtu}
@@ -1207,7 +1454,7 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$sndwnd" ] && sndwnd="$D_SNDWND"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置发送窗口大小(sndwnd)
@@ -1225,7 +1472,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	sndwnd = ${sndwnd}
@@ -1233,7 +1480,7 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$rcvwnd" ] && rcvwnd="$D_RCVWND"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置接收窗口大小(rcvwnd)
@@ -1250,7 +1497,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	rcvwnd = ${rcvwnd}
@@ -1258,7 +1505,7 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$datashard" ] && datashard="$D_DATASHARD"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置前向纠错 datashard
@@ -1276,7 +1523,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	datashard = ${datashard}
@@ -1284,7 +1531,7 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$parityshard" ] && parityshard="$D_PARITYSHARD"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置前向纠错 parityshard
@@ -1302,7 +1549,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	parityshard = ${parityshard}
@@ -1310,7 +1557,7 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$dscp" ] && dscp="$D_DSCP"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置差分服务代码点(DSCP)
@@ -1327,7 +1574,7 @@ set_kcptun_config() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	DSCP = ${dscp}
@@ -1335,14 +1582,17 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$nocomp" ] && nocomp="$D_NOCOMP"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否关闭数据压缩?
+		对CPU性能有损耗
+		如果是文本类数据，可设手动开启
+		如果是数据套壳，则默认保持关闭直接
 		EOF
 		read -p "(默认: ${nocomp}) [y/n]: " yn
 		if [ -n "$yn" ]; then
-			case "${yn:0:1}" in
+			case "$(first_character "$yn")" in
 				y|Y)
 					nocomp='true'
 					;;
@@ -1358,7 +1608,7 @@ set_kcptun_config() {
 		break
 	done
 
-	yn=
+	yn=""
 	cat >&1 <<-EOF
 	---------------------------
 	nocomp = ${nocomp}
@@ -1366,14 +1616,14 @@ set_kcptun_config() {
 	EOF
 
 	[ -z "$quiet" ] && quiet="$D_QUIET"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否屏蔽 open/close 日志输出?
 		EOF
 		read -p "(默认: ${quiet}) [y/n]: " yn
 		if [ -n "$yn" ]; then
-			case "${yn:0:1}" in
+			case "$(first_character "$yn")" in
 				y|Y)
 					quiet='true'
 					;;
@@ -1389,16 +1639,51 @@ set_kcptun_config() {
 		break
 	done
 
-	yn=
+	yn=""
 	cat >&1 <<-EOF
 	---------------------------
 	quiet = ${quiet}
 	---------------------------
 	EOF
 
+	[ -z "$tcp" ] && tcp="$D_TCP"
+	while true
+	do
+		cat >&1 <<-'EOF'
+		是否使用 TCP 传输
+		EOF
+		read -p "(默认: ${tcp}) [y/n]: " yn
+		if [ -n "$yn" ]; then
+			case "$(first_character "$yn")" in
+				y|Y)
+					tcp='true'
+					;;
+				n|N)
+					tcp='false'
+					;;
+				*)
+					echo "输入有误，请重新输入!"
+					continue
+					;;
+			esac
+		fi
+		break
+	done
+
+	if [ "$tcp" = "true" ]; then
+		run_user="root"
+	fi
+
+	yn=""
+	cat >&1 <<-EOF
+	---------------------------
+	tcp = ${tcp}
+	---------------------------
+	EOF
+
 	unset_snmp() {
-		snmplog=
-		snmpperiod=
+		snmplog=""
+		snmpperiod=""
 		cat >&1 <<-EOF
 		---------------------------
 		不记录 SNMP 日志
@@ -1411,7 +1696,7 @@ set_kcptun_config() {
 	EOF
 	read -p "(默认: 否) [y/n]: " yn
 	if [ -n "$yn" ]; then
-		case "${yn:0:1}" in
+		case "$(first_character "$yn")" in
 			y|Y)
 				set_snmp
 				;;
@@ -1419,13 +1704,13 @@ set_kcptun_config() {
 				unset_snmp
 				;;
 		esac
-		yn=
+		yn=""
 	else
 		unset_snmp
 	fi
 
 	[ -z "$pprof" ] && pprof="$D_PPROF"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否开启 pprof 性能监控?
@@ -1433,7 +1718,7 @@ set_kcptun_config() {
 		EOF
 		read -p "(默认: ${pprof}) [y/n]: " yn
 		if [ -n "$yn" ]; then
-			case "${yn:0:1}" in
+			case "$(first_character "$yn")" in
 				y|Y)
 					pprof='true'
 					;;
@@ -1449,7 +1734,7 @@ set_kcptun_config() {
 		break
 	done
 
-	yn=
+	yn=""
 	cat >&1 <<-EOF
 	---------------------------
 	pprof = ${pprof}
@@ -1457,9 +1742,12 @@ set_kcptun_config() {
 	EOF
 
 	unset_hidden_parameters() {
-		acknodelay=
-		sockbuf=
-		keepalive=
+		acknodelay=""
+		sockbuf=""
+		smuxbuf=""
+		keepalive=""
+		streambuf=""
+		smuxver=""
 		cat >&1 <<-EOF
 		---------------------------
 		不配置隐藏参数
@@ -1473,7 +1761,7 @@ set_kcptun_config() {
 	EOF
 	read -p "(默认: 否) [y/n]: " yn
 	if [ -n "$yn" ]; then
-		case "${yn:0:1}" in
+		case "$(first_character "$yn")" in
 			y|Y)
 				set_hidden_parameters
 				;;
@@ -1485,8 +1773,24 @@ set_kcptun_config() {
 		unset_hidden_parameters
 	fi
 
-	if [ $listen_port -le 1024 ]; then
-		run_user="root"
+	if echo "$input" | grep -qE '^[0-9]+-[0-9]+$'; then
+		range_start=$(echo "$input" | cut -d'-' -f1)
+		range_end=$(echo "$input" | cut -d'-' -f2)
+
+		if [ "$range_start" -ge 1 ] && [ "$range_start" -le 65535 ] && \
+			[ "$range_end" -ge 1 ] && [ "$range_end" -le 65535 ] && \
+			[ "$range_start" -le "$range_end" ]; then
+			# 新增端口段检测逻辑
+			if [ "$range_start" -le 1024 ] || [ "$range_end" -le 1024 ]; then
+				run_user="root"
+			fi
+		fi
+	elif is_port "$input"; then
+		listen_port="$input"
+		# 端口检测逻辑
+		if [ "$listen_port" -le 1024 ]; then
+			run_user="root"
+		fi
 	fi
 
 	echo "配置完成。"
@@ -1496,9 +1800,9 @@ set_kcptun_config() {
 set_snmp() {
 	snmplog="$(get_current_file 'snmp')"
 
-	local input=
+	local input=""
 	[ -z "$snmpperiod" ] && snmpperiod="$D_SNMPPERIOD"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置 SNMP 记录间隔时间 snmpperiod
@@ -1525,11 +1829,11 @@ set_snmp() {
 
 set_manual_parameters() {
 	echo "开始配置手动参数..."
-	local input=
-	local yn=
+	local input=""
+	local yn=""
 
 	[ -z "$nodelay" ] && nodelay="$D_NODELAY"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否启用 nodelay 模式?
@@ -1538,7 +1842,7 @@ set_manual_parameters() {
 		EOF
 		read -p "(默认: ${nodelay}) [0/1]: " input
 		if [ -n "$input" ]; then
-			case "${input:0:1}" in
+			case "$(first_character "$input")" in
 				1)
 					nodelay=1
 					;;
@@ -1554,7 +1858,7 @@ set_manual_parameters() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	nodelay = ${nodelay}
@@ -1562,7 +1866,7 @@ set_manual_parameters() {
 	EOF
 
 	[ -z "$interval" ] && interval="$D_INTERVAL"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置协议内部工作的 interval
@@ -1579,7 +1883,7 @@ set_manual_parameters() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	interval = ${interval}
@@ -1587,7 +1891,7 @@ set_manual_parameters() {
 	EOF
 
 	[ -z "$resend" ] && resend="$D_RESEND"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否启用快速重传模式(resend)?
@@ -1597,7 +1901,7 @@ set_manual_parameters() {
 		EOF
 		read -p "(默认: ${resend}) 请选择 [0~2]: " input
 		if [ -n "$input" ]; then
-			case "${input:0:1}" in
+			case "$(first_character "$input")" in
 				0)
 					resend=0
 					;;
@@ -1616,7 +1920,7 @@ set_manual_parameters() {
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	resend = ${resend}
@@ -1624,7 +1928,7 @@ set_manual_parameters() {
 	EOF
 
 	[ -z "$nc" ] && nc="$D_NC"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否关闭流控(nc)?
@@ -1633,7 +1937,7 @@ set_manual_parameters() {
 		EOF
 		read -p "(默认: ${nc}) [0/1]: " input
 		if [ -n "$input" ]; then
-			case "${input:0:1}" in
+			case "$(first_character "$input")" in
 				0)
 					nc=0
 					;;
@@ -1657,18 +1961,18 @@ set_manual_parameters() {
 
 set_hidden_parameters() {
 	echo "开始设置隐藏参数..."
-	local input=
-	local yn=
+	local input=""
+	local yn=""
 
 	[ -z "$acknodelay" ] && acknodelay="$D_ACKNODELAY"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		是否启用 acknodelay 模式?
 		EOF
 		read -p "(默认: ${acknodelay}) [y/n]: " yn
 		if [ -n "$yn" ]; then
-			case "${yn:0:1}" in
+			case "$(first_character "$yn")" in
 				y|Y)
 					acknodelay="true"
 					;;
@@ -1684,7 +1988,7 @@ set_hidden_parameters() {
 		break
 	done
 
-	yn=
+	yn=""
 	cat >&1 <<-EOF
 	---------------------------
 	acknodelay = ${acknodelay}
@@ -1692,7 +1996,7 @@ set_hidden_parameters() {
 	EOF
 
 	[ -z "$sockbuf" ] && sockbuf="$D_SOCKBUF"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置 UDP 收发缓冲区大小(sockbuf)
@@ -1704,20 +2008,45 @@ set_hidden_parameters() {
 				continue
 			fi
 
-			sockbuf=$(expr $input * 1024 * 1024)
+			sockbuf=$(expr $input \* 1024 \* 1024)
 		fi
 		break
 	done
 
-	input=
+	input=""
 	cat >&1 <<-EOF
 	---------------------------
 	sockbuf = ${sockbuf}
 	---------------------------
 	EOF
 
+	[ -z "$smuxbuf" ] && smuxbuf="$D_SMUXBUF"
+	while true
+	do
+		cat >&1 <<-'EOF'
+		请设置 de-mux 缓冲区大小(smuxbuf)
+		EOF
+		read -p "(单位: MB, 默认: $(expr ${smuxbuf} / 1024 / 1024)): " input
+		if [ -n "$input" ]; then
+			if ! is_number "$input" || [ $input -le 0 ]; then
+				echo "输入有误, 请输入大于0的数字!"
+				continue
+			fi
+
+			smuxbuf=$(expr $input \* 1024 \* 1024)
+		fi
+		break
+	done
+
+	input=""
+	cat >&1 <<-EOF
+	---------------------------
+	smuxbuf = ${smuxbuf}
+	---------------------------
+	EOF
+
 	[ -z "$keepalive" ] && keepalive="$D_KEEPALIVE"
-	while :
+	while true
 	do
 		cat >&1 <<-'EOF'
 		请设置 Keepalive 的间隔时间
@@ -1739,12 +2068,61 @@ set_hidden_parameters() {
 	keepalive = ${keepalive}
 	---------------------------
 	EOF
+
+	[ -z "$smuxver" ] && smuxver="$D_SMUXVER"
+	while true
+	do
+		cat >&1 <<-'EOF'
+		请设置 smux 的版本
+		EOF
+		read -p "(1,2, 默认值: ${smuxver}, 老版本默认1，新版本默认2): " input
+		if [ -n "$input" ]; then
+			if ! is_number "$input" || [ $input -le 0 ]; then
+				echo "输入有误, 请输入大于0的数字!"
+				continue
+			fi
+
+			smuxver=$input
+		fi
+		break
+	done
+
+	cat >&1 <<-EOF
+	---------------------------
+	$smuxver = ${smuxver}
+	---------------------------
+	EOF
+
+	[ -z "$streambuf" ] && streambuf="$D_STREAMBUF"
+	while true
+	do
+		cat >&1 <<-'EOF'
+		请设置 streambuf 大小，官方文档介绍本值不宜过大
+		EOF
+		read -p "(单位: MB, 默认: $(expr ${streambuf} / 1024 / 1024)): " input
+		if [ -n "$input" ]; then
+			if ! is_number "$input" || [ $input -le 0 ]; then
+				echo "输入有误, 请输入大于0的数字!"
+				continue
+			fi
+
+			streambuf=$(expr $input \* 1024 \* 1024)
+		fi
+		break
+	done
+
+	cat >&1 <<-EOF
+	---------------------------
+	streambuf = ${streambuf}
+	---------------------------
+	EOF
 }
 
+# 生成 Kcptun 服务端配置文件
 gen_kcptun_config() {
 	mk_file_dir() {
-		local dir=
-		dir="$(dirname $1)"
+		local dir=""
+		dir="$(dirname "$1")"
 		local mod=$2
 
 		if [ ! -d "$dir" ]; then
@@ -1759,9 +2137,9 @@ gen_kcptun_config() {
 		fi
 	}
 
-	local config_file=
+	local config_file=""
 	config_file="$(get_current_file 'config')"
-	local supervisor_config_file=
+	local supervisor_config_file=""
 	supervisor_config_file="$(get_current_file 'supervisor')"
 
 	mk_file_dir "$config_file"
@@ -1792,7 +2170,9 @@ gen_kcptun_config() {
 	  "datashard": ${datashard},
 	  "parityshard": ${parityshard},
 	  "dscp": ${dscp},
-	  "nocomp": ${nocomp}
+	  "nocomp": ${nocomp},
+	  "quiet": ${quiet},
+	  "tcp": ${tcp}
 	}
 	EOF
 
@@ -1800,7 +2180,7 @@ gen_kcptun_config() {
 		install_jq
 		local k; local v
 
-		local json=
+		local json=""
 		json="$(cat "$config_file")"
 		for k in "$@"; do
 			v="$(eval echo "\$$k")"
@@ -1819,8 +2199,8 @@ gen_kcptun_config() {
 		fi
 	}
 
-	write_configs_to_file "quiet" "snmplog" "snmpperiod" "pprof" "acknodelay" "nodelay" \
-		"interval" "resend" "nc" "sockbuf" "keepalive"
+	write_configs_to_file "snmplog" "snmpperiod" "pprof" "acknodelay" "nodelay" \
+		"interval" "resend" "nc" "sockbuf" "smuxbuf" "keepalive" "streambuf" "smuxver"
 
 	if ! grep -q "^${run_user}:" '/etc/passwd'; then
 		(
@@ -1843,6 +2223,7 @@ gen_kcptun_config() {
 	EOF
 }
 
+# 设置防火墙开放端口
 set_firewall() {
 	if command_exists firewall-cmd; then
 		if ! ( firewall-cmd --state >/dev/null 2>&1 ); then
@@ -1899,7 +2280,7 @@ select_instance() {
 		当前有多个 Kcptun 实例 (按最后修改时间排序):
 		EOF
 
-		local files=
+		local files=""
 		files=$(ls -lt '/etc/supervisor/conf.d/' | grep "^-" | awk '{print $9}' | grep "^kcptun[0-9]*\.conf$")
 		local i=0
 		local array=""
@@ -1912,8 +2293,8 @@ select_instance() {
 			echo "(${i}) ${file%.*}"
 		done
 
-		local sel=
-		while :
+		local sel=""
+		while true
 		do
 			read -p "请选择 [1~${i}]: " sel
 			if [ -n "$sel" ]; then
@@ -1936,6 +2317,7 @@ select_instance() {
 	fi
 }
 
+# 通过当前服务端环境获取 Kcptun 服务端文件名
 get_kcptun_server_file() {
 	if [ -z "$file_suffix" ]; then
 		get_arch
@@ -1944,6 +2326,7 @@ get_kcptun_server_file() {
 	echo "${KCPTUN_INSTALL_DIR}/server_$file_suffix"
 }
 
+# 计算新实例的 ID
 get_new_instance_id() {
 	if [ -f "/etc/supervisor/conf.d/kcptun.conf" ]; then
 		local i=2
@@ -1955,8 +2338,9 @@ get_new_instance_id() {
 	fi
 }
 
+# 获取已安装的 Kcptun 版本
 get_installed_version() {
-	local server_file=
+	local server_file=""
 	server_file="$(get_kcptun_server_file)"
 
 	if [ -f "$server_file" ]; then
@@ -1964,12 +2348,13 @@ get_installed_version() {
 			chmod a+x "$server_file"
 		fi
 
-		echo "$(${server_file} -v 2>/dev/null | awk '{printf $3}')"
+		echo "$(${server_file} -v 2>/dev/null | awk '{print $3}')"
 	fi
 }
 
+# 加载当前选择实例的配置文件
 load_instance_config() {
-	local config_file=
+	local config_file=""
 	config_file="$(get_current_file 'config')"
 
 	if [ ! -s "$config_file" ]; then
@@ -1979,7 +2364,7 @@ load_instance_config() {
 		exit 1
 	fi
 
-	local config_content=
+	local config_content=""
 	config_content="$(cat ${config_file})"
 
 	if [ -z "$(get_json_string "$config_content" '.listen')" ]; then
@@ -1990,11 +2375,11 @@ load_instance_config() {
 		exit 1
 	fi
 
-	local lines=
+	local lines=""
 	lines="$(get_json_string "$config_content" 'to_entries | map("\(.key)=\(.value | @sh)") | .[]')"
 
 	OLDIFS=$IFS
-	IFS=$'\n'
+	IFS=$(printf '\n')
 	for line in $lines; do
 		eval "$line"
 	done
@@ -2003,12 +2388,12 @@ load_instance_config() {
 	if [ -n "$listen" ]; then
 		listen_port="$(echo "$listen" | rev | cut -d ':' -f1 | rev)"
 		listen_addr="$(echo "$listen" | sed "s/:${listen_port}$//" | grep -oE '[0-9a-fA-F\.:]*')"
-		listen=
+		listen=""
 	fi
 	if [ -n "$target" ]; then
 		target_port="$(echo "$target" | rev | cut -d ':' -f1 | rev)"
 		target_addr="$(echo "$target" | sed "s/:${target_port}$//" | grep -oE '[0-9a-fA-F\.:]*')"
-		target=
+		target=""
 	fi
 
 	if [ -n "$listen_port" ]; then
@@ -2016,8 +2401,9 @@ load_instance_config() {
 	fi
 }
 
+# 显示服务端 Kcptun 版本，和客户端文件的下载地址
 show_version_and_client_url() {
-	local version=
+	local version=""
 	version="$(get_installed_version)"
 	if [ -n "$version" ]; then
 		cat >&1 <<-EOF
@@ -2035,39 +2421,45 @@ show_version_and_client_url() {
 	fi
 }
 
+# 显示当前选择实例的信息
 show_current_instance_info() {
-	local server_ip=
+	local server_ip=""
 	server_ip="$(get_server_ip)"
 
-	printf "服务器IP: \033[41;37m ${server_ip} \033[0m\n"
-	printf "端口: \033[41;37m ${listen_port} \033[0m\n"
-	printf "加速地址: \033[41;37m ${target_addr}:${target_port}\033[0m\n"
+	printf '服务器IP: \033[41;37m %s \033[0m\n' "$server_ip"
+	printf '端口: \033[41;37m %s \033[0m\n' "$listen_port"
+	printf '加速地址: \033[41;37m %s:%s \033[0m\n' "$target_addr" "$target_port"
 
 	show_configs() {
 		local k; local v
 		for k in "$@"; do
 			v="$(eval echo "\$$k")"
 			if [ -n "$v" ]; then
-				printf "${k}: \033[41;37m ${v} \033[0m\n"
+				printf '%s: \033[41;37m %s \033[0m\n' "$k" "$v"
 			fi
 		done
 	}
 
 	show_configs "key" "crypt" "mode" "mtu" "sndwnd" "rcvwnd" "datashard" \
-		"parityshard" "dscp" "nocomp" "quiet" "nodelay" "interval" "resend" \
-		"nc" "acknodelay" "sockbuf" "keepalive"
+		"parityshard" "dscp" "nocomp" "quiet" "tcp" "nodelay" "interval" "resend" \
+		"nc" "acknodelay" "sockbuf" "smuxbuf" "keepalive" "streambuf" "smuxver"
 
 	show_version_and_client_url
 
 	install_jq
-	local client_config=
-	read -d '' client_config <<-EOF
+	local client_config=""
+
+	# 这里输出的是客户端所使用的配置信息
+	# 客户端的 *remoteaddr* 端口号为服务端的 *listen_port*
+	# 客户端的 *localaddr* 端口号被设置为了服务端的加速端口
+	client_config="$(cat <<-EOF
 	{
 	  "localaddr": ":${target_port}",
 	  "remoteaddr": "${server_ip}:${listen_port}",
 	  "key": "${key}"
 	}
 	EOF
+	)"
 
 	gen_client_configs() {
 		local k; local v
@@ -2091,8 +2483,8 @@ show_current_instance_info() {
 	}
 
 	gen_client_configs "crypt" "mode" "mtu" "sndwnd" "rcvwnd" "datashard" \
-		"parityshard" "dscp" "nocomp" "quiet" "nodelay" "interval" "resend" \
-		"nc" "acknodelay" "sockbuf" "keepalive"
+		"parityshard" "dscp" "nocomp" "quiet" "tcp" "nodelay" "interval" "resend" \
+		"nc" "acknodelay" "sockbuf" "smuxbuf" "keepalive" "streambuf" "smuxver"
 
 	cat >&1 <<-EOF
 
@@ -2101,7 +2493,7 @@ show_current_instance_info() {
 	EOF
 
 	local mobile_config="key=${key}"
-	gen_client_configs() {
+	gen_mobile_configs() {
 		local k; local v
 		for k in "$@"; do
 			if [ "$k" = "sndwnd" ]; then
@@ -2124,9 +2516,9 @@ show_current_instance_info() {
 		done
 	}
 
-	gen_client_configs "crypt" "mode" "mtu" "sndwnd" "rcvwnd" "datashard" \
-		"parityshard" "dscp" "nocomp" "quiet" "nodelay" "interval" "resend" \
-		"nc" "acknodelay" "sockbuf" "keepalive"
+	gen_mobile_configs "crypt" "mode" "mtu" "sndwnd" "rcvwnd" "datashard" \
+		"parityshard" "dscp" "nocomp" "quiet" "tcp" "nodelay" "interval" "resend" \
+		"nc" "acknodelay" "sockbuf" "smuxbuf" "keepalive" "streambuf" "smuxver"
 
 	cat >&1 <<-EOF
 
@@ -2171,6 +2563,7 @@ do_install() {
 	EOF
 }
 
+# 卸载操作
 do_uninstall() {
 	check_root
 	cat >&1 <<-'EOF'
@@ -2203,11 +2596,12 @@ do_uninstall() {
 
 	read -p "(默认: 不卸载) 请选择 [y/n]: " yn
 	if [ -n "$yn" ]; then
-		case "${yn:0:1}" in
+		case "$(first_character "$yn")" in
 			y|Y)
 				if command_exists systemctl; then
 					systemctl disable supervisord.service
-					rm -f '/lib/systemd/system/supervisord.service'
+					rm -f "/lib/systemd/system/supervisord.service" \
+						"/etc/systemd/system/supervisord.service"
 				elif command_exists service; then
 					if [ -z "$lsb_dist" ]; then
 						get_os_info
@@ -2232,7 +2626,15 @@ do_uninstall() {
 
 				(
 					set -x
-					rm -rf "$(easy_install -mxN supervisor | grep 'Using.*supervisor.*\.egg' | awk '{print $2}')"
+					# 新版使用 pip 卸载
+					if command_exists pip; then
+						pip uninstall -y supervisor 2>/dev/null || true
+					fi
+
+					# 旧版使用 easy_install 卸载
+					if command_exists easy_install; then
+						rm -rf "$(easy_install -mxN supervisor | grep 'Using.*supervisor.*\.egg' | awk '{print $2}')"
+					fi
 
 					rm -rf '/etc/supervisor/'
 					rm -f '/usr/local/bin/supervisord' \
@@ -2253,11 +2655,12 @@ do_uninstall() {
 
 	cat >&1 <<-EOF
 	卸载完成, 欢迎再次使用。
-	注意: 脚本没有自动卸载 python-setuptools (包含 easy_install)
+	注意: 脚本没有自动卸载 python-pip 和 python-setuptools（旧版脚本使用）
 	如有需要, 你可以自行卸载。
 	EOF
 }
 
+# 更新
 do_update() {
 	pre_ckeck
 
@@ -2272,7 +2675,7 @@ do_update() {
 			cat >&1 <<-EOF
 			发现一键安装脚本更新, 版本号: ${new_shell_version}
 			更新说明:
-			$(printf "${shell_change_log}\n")
+			$(printf '%s\n' "$shell_change_log")
 			EOF
 			any_key_to_continue
 
@@ -2298,7 +2701,7 @@ do_update() {
 			cat >&1 <<-EOF
 			发现 Kcptun 配置更新, 版本号: v${new_config_version}
 			更新说明:
-			$(printf "${config_change_log}\n")
+			$(printf '%s\n' "$config_change_log")
 			需要重新设置 Kcptun
 			EOF
 			any_key_to_continue
@@ -2313,7 +2716,7 @@ do_update() {
 			cat >&1 <<-EOF
 			发现服务启动脚本文件更新, 版本号: v${new_init_version}
 			更新说明:
-			$(printf "${init_change_log}\n")
+			$(printf '%s\n' "$init_change_log")
 			EOF
 
 			any_key_to_continue
@@ -2324,12 +2727,10 @@ do_update() {
 		fi
 	fi
 
-	easy_install -U supervisor >/dev/null 2>&1
-
 	echo "开始获取 Kcptun 版本信息..."
 	get_kcptun_version_info
 
-	local cur_tag_name=
+	local cur_tag_name=""
 	cur_tag_name="$(get_installed_version)"
 
 	if [ -n "$cur_tag_name" ] && is_number "$cur_tag_name" && [ ${#cur_tag_name} -eq 8 ]; then
@@ -2341,7 +2742,7 @@ do_update() {
 		发现 Kcptun 新版本 ${kcptun_release_tag_name}
 		$([ "$kcptun_release_prerelease" = "true" ] && printf "\033[41;37m 注意: 该版本为预览版, 请谨慎更新 \033[0m")
 		更新说明:
-		$(printf "${kcptun_release_body}\n")
+		$(printf '%s\n' "$kcptun_release_body")
 		EOF
 		any_key_to_continue
 
@@ -2356,6 +2757,7 @@ do_update() {
 	fi
 }
 
+# 添加实例
 instance_add() {
 	pre_ckeck
 
@@ -2375,6 +2777,7 @@ instance_add() {
 	show_current_instance_info
 }
 
+# 删除实例
 instance_del() {
 	pre_ckeck
 
@@ -2399,6 +2802,7 @@ instance_del() {
 	EOF
 	any_key_to_continue
 
+	# 获取实例的 supervisor 配置文件
 	supervisor_config_file="$(get_current_file 'supervisor')"
 	if [ ! -f "$supervisor_config_file" ]; then
 		echo "你选择的实例 kcptun${current_instance_id} 不存在!"
@@ -2424,6 +2828,7 @@ instance_del() {
 	EOF
 }
 
+# 显示实例信息
 instance_show() {
 	pre_ckeck
 
@@ -2450,6 +2855,7 @@ instance_show() {
 	show_current_instance_info
 }
 
+# 显示实例日志
 instance_log() {
 	pre_ckeck
 
@@ -2471,7 +2877,7 @@ instance_log() {
 
 	echo "你选择了查看实例 kcptun${current_instance_id} 的日志, 正在读取..."
 
-	local log_file=
+	local log_file=""
 	log_file="$(get_current_file 'log')"
 
 	if [ -f "$log_file" ]; then
@@ -2488,6 +2894,7 @@ instance_log() {
 	fi
 }
 
+# 重新配置实例
 instance_reconfig() {
 	pre_ckeck
 
@@ -2517,7 +2924,7 @@ instance_reconfig() {
 		exit 1
 	fi
 
-	local sel=
+	local sel=""
 	cat >&1 <<-'EOF'
 	请选择操作:
 	(1) 重新配置实例所有选项
@@ -2525,12 +2932,12 @@ instance_reconfig() {
 	EOF
 	read -p "(默认: 1) 请选择: " sel
 	echo
-	[ -z "$sel" ] && sel=1
+	[ -z "$sel" ] && sel="1"
 
-	case "${sel:0:1}" in
+	case "$(first_character "$sel")" in
 		2)
 			echo "正在打开配置文件, 请手动修改..."
-			local config_file=
+			local config_file=""
 			config_file="$(get_current_file 'config')"
 			edit_config_file() {
 				if [ ! -f "$config_file" ]; then
@@ -2566,6 +2973,14 @@ instance_reconfig() {
 
 	if command_exists supervisorctl; then
 		supervisorctl restart "kcptun${current_instance_id}"
+
+		if [ "$?" != "0" ]; then
+			cat >&2 <<-'EOF'
+			重启 Supervisor 失败, Kcptun 无法正常工作!
+			请查看日志获取原因，或者反馈给脚本作者。
+			EOF
+			exit 1
+		fi
 	else
 		start_supervisor
 	fi
@@ -2585,9 +3000,9 @@ manual_install() {
 	你选择了自定义版本安装, 正在开始操作...
 	EOF
 
-	local tag_name=$1
+	local tag_name="$1"
 
-	while :
+	while true
 	do
 		if [ -z "$tag_name" ]; then
 			cat >&1 <<-'EOF'
@@ -2602,15 +3017,15 @@ manual_install() {
 
 		if [ "$tag_name" = "SNMP_Milestone" ]; then
 			echo "不支持此版本, 请重新输入!"
-			tag_name=
+			tag_name=""
 			continue
 		fi
 
-		local version_num=
+		local version_num=""
 		version_num=$(echo "$tag_name" | grep -oE "[0-9]+" || "0")
 		if [ ${#version_num} -eq 8 ] && [ $version_num -le 20160826 ]; then
 			echo "不支持安装 v20160826 及以前版本"
-			tag_name=
+			tag_name=""
 			continue
 		fi
 
@@ -2623,7 +3038,7 @@ manual_install() {
 			  ${KCPTUN_TAGS_URL}
 			查看所有可用 TAG
 			EOF
-			tag_name=
+			tag_name=""
 			continue
 		else
 			cat >&1 <<-EOF
@@ -2653,6 +3068,7 @@ pre_ckeck() {
 	fi
 }
 
+# 监测是否安装了 kcptun
 is_installed() {
 	if [ -d '/usr/share/kcptun' ]; then
 		cat >&1 <<-EOF
@@ -2679,13 +3095,13 @@ is_installed() {
 
 # 检查是否已经安装
 installed_check() {
-	local instance_count=
+	local instance_count=""
 	instance_count="$(get_instance_count)"
 	if is_installed && [ $instance_count -gt 0 ]; then
 		cat >&1 <<-EOF
 		检测到你已安装 Kcptun 服务端, 已配置的实例个数为 ${instance_count} 个
 		EOF
-		while :
+		while true
 		do
 			cat >&1 <<-'EOF'
 			请选择你希望的操作:
diff --git a/kcptun/version.json b/kcptun/version.json
index 2a9daba..e12dc29 100644
--- a/kcptun/version.json
+++ b/kcptun/version.json
@@ -1,9 +1,9 @@
 {
-	"shell_version": 20,
+	"shell_version": 26,
 	"shell_url": "https://github.com/kuoruan/shell-scripts/raw/master/kcptun/kcptun.sh",
-	"change_log": "1.将常规信息输出到 stdout，将错误信息输出到 stderr;\n2.修复某些情况下无法获取到正确实例 ID 的问题;\n3.由于 Kcptun 支持多客户端同时连接一个服务端端口，故修改提示信息 “多用户” => “多端口”",
-	"config_version": 6,
-	"config_change_log": "1.支持 snmp 和 pprof 参数;\n2.输出新版手机端参数",
+	"change_log": "1. smuxver 和 streambuf 支持;\n2. 添加端口范围支持",
+	"config_version": 7,
+	"config_change_log": "1. sockbuf 和 smuxbuf 默认值改为 16M;\n2. nocomp 默认改为 true",
 	"init_version": 3,
 	"init_change_log": "1.修复 CentOS 上找不到 Supervisor 执行文件的问题;\n2.由于 Supervisor 的版本不同, 执行文件的目录可能不一样, 如果你出现无法安装或启动失败的问题, 请及时联系我"
 }
diff --git a/ovz-bbr/ovz-bbr-installer.sh b/ovz-bbr/ovz-bbr-installer.sh
index 4f7b613..f6259a9 100755
--- a/ovz-bbr/ovz-bbr-installer.sh
+++ b/ovz-bbr/ovz-bbr-installer.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 : <<-'EOF'
-Copyright 2017 Xingwang Liao <kuoruan@gmail.com>
+Copyright 2017-2019 Xingwang Liao <kuoruan@gmail.com>
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at