TCP BBR - 一键开启脚本
这是秋水逸冰提供的TCP BBR一键开启脚本，脚本详细说明地址：
按照说明操作就可以了，注意问题：这个脚本获取有的时候可能有问题，如果提示脚本获取失败，多执行几次就可以了。
如果脚本获取失败，那么可以把下面脚本保存到本地，随后上传到要开启TCP BBR的Linux服务器中，在root身份下执行就可以了。下面是秋水逸冰提供的TCP BBR一键开启脚本：
#!/usr/bin/env bash # # Auto install latest kernel for TCP BBR # # System Required: CentOS 6+, Debian7+, Ubuntu12+ # # Copyright (C) 2016-2018 Teddysun <i@teddysun.com> # # URL: https://teddysun.com/489.html # red='\033[0;31m' green='\033[0;32m' yellow='\033[0;33m' plain='\033[0m' cur_dir=$(pwd) [[ $EUID -ne 0 ]] && echo -e "${red}Error:${plain} This script must be run as root!" && exit 1 [[ -d "/proc/vz" ]] && echo -e "${red}Error:${plain} Your VPS is based on OpenVZ, which is not supported." && exit 1 if [ -f /etc/redhat-release ]; then release="centos" elif cat /etc/issue | grep -Eqi "debian"; then release="debian" elif cat /etc/issue | grep -Eqi "ubuntu"; then release="ubuntu" elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then release="centos" elif cat /proc/version | grep -Eqi "debian"; then release="debian" elif cat /proc/version | grep -Eqi "ubuntu"; then release="ubuntu" elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then release="centos" else release="" fi is_digit(){ local input=${1} if [[ "$input" =~ ^[0-9]+$ ]]; then return 0 else return 1 fi } get_valid_valname(){ local val=${1} local new_val=$(eval echo $val | sed 's/[-.]/_/g') echo ${new_val} } get_hint(){ local val=${1} local new_val=$(get_valid_valname $val) eval echo "\$hint_${new_val}" } #Display Memu display_menu(){ local soft=${1} local default=${2} eval local arr=(\${${soft}_arr[@]}) local default_prompt if [[ "$default" != "" ]]; then if [[ "$default" == "last" ]]; then default=${#arr[@]} fi default_prompt="(default ${arr[$default-1]})" fi local pick local hint local vname local prompt="which ${soft} you'd select ${default_prompt}: " while : do echo -e "\n------------ ${soft} setting ------------\n" for ((i=1;i<=${#arr[@]};i++ )); do vname="$(get_valid_valname ${arr[$i-1]})" hint="$(get_hint $vname)" [[ "$hint" == "" ]] && hint="${arr[$i-1]}" echo -e "${green}${i}${plain}) $hint" done echo read -p "${prompt}" pick if [[ "$pick" == "" && "$default" != "" ]]; then pick=${default} break fi if ! is_digit "$pick"; then prompt="Input error, please input a number" continue fi if [[ "$pick" -lt 1 || "$pick" -gt ${#arr[@]} ]]; then prompt="Input error, please input a number between 1 and ${#arr[@]}: " continue fi break done eval ${soft}=${arr[$pick-1]} vname="$(get_valid_valname ${arr[$pick-1]})" hint="$(get_hint $vname)" [[ "$hint" == "" ]] && hint="${arr[$pick-1]}" echo -e "\nyour selection: $hint\n" } version_ge(){ test "$(echo "$@" | tr " " "\n" | sort -rV | head -n 1)" == "$1" } get_latest_version() { latest_version=($(wget -qO- http://kernel.ubuntu.com/~kernel-ppa/mainline/ | awk -F'\"v' '/v[4-9]./{print $2}' | cut -d/ -f1 | grep -v - | sort -V)) [ ${#latest_version[@]} -eq 0 ] && echo -e "${red}Error:${plain} Get latest kernel version failed." && exit 1 kernel_arr=() for i in ${latest_version[@]}; do if version_ge $i 4.14; then kernel_arr+=($i); fi done display_menu kernel last if [[ `getconf WORD_BIT` == "32" && `getconf LONG_BIT` == "64" ]]; then deb_name=$(wget -qO- http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/ | grep "linux-image" | grep "generic" | awk -F'\">' '/amd64.deb/{print $2}' | cut -d'<' -f1 | head -1) deb_kernel_url="http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/${deb_name}" deb_kernel_name="linux-image-${kernel}-amd64.deb" modules_deb_name=$(wget -qO- http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/ | grep "linux-modules" | grep "generic" | awk -F'\">' '/amd64.deb/{print $2}' | cut -d'<' -f1 | head -1) deb_kernel_modules_url="http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/${modules_deb_name}" deb_kernel_modules_name="linux-modules-${kernel}-amd64.deb" else deb_name=$(wget -qO- http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/ | grep "linux-image" | grep "generic" | awk -F'\">' '/i386.deb/{print $2}' | cut -d'<' -f1 | head -1) deb_kernel_url="http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/${deb_name}" deb_kernel_name="linux-image-${kernel}-i386.deb" modules_deb_name=$(wget -qO- http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/ | grep "linux-modules" | grep "generic" | awk -F'\">' '/i386.deb/{print $2}' | cut -d'<' -f1 | head -1) deb_kernel_modules_url="http://kernel.ubuntu.com/~kernel-ppa/mainline/v${kernel}/${modules_deb_name}" deb_kernel_modules_name="linux-modules-${kernel}-i386.deb" fi [ -z ${deb_name} ] && echo -e "${red}Error:${plain} Getting Linux kernel binary package name failed, maybe kernel build failed. Please choose other one and try again." && exit 1 } get_opsy() { [ -f /etc/redhat-release ] && awk '{print ($1,$3~/^[0-9]/?$3:$4)}' /etc/redhat-release && return [ -f /etc/os-release ] && awk -F'[= "]' '/PRETTY_NAME/{print $3,$4,$5}' /etc/os-release && return [ -f /etc/lsb-release ] && awk -F'[="]+' '/DESCRIPTION/{print $2}' /etc/lsb-release && return } opsy=$( get_opsy ) arch=$( uname -m ) lbit=$( getconf LONG_BIT ) kern=$( uname -r ) 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 $SAVEDSTTY } getversion() { if [[ -s /etc/redhat-release ]]; then grep -oE "[0-9.]+" /etc/redhat-release else grep -oE "[0-9.]+" /etc/issue fi } centosversion() { if [ x"${release}" == x"centos" ]; then local code=$1 local version="$(getversion)" local main_ver=${version%%.*} if [ "$main_ver" == "$code" ]; then return 0 else return 1 fi else return 1 fi } check_bbr_status() { local param=$(sysctl net.ipv4.tcp_congestion_control | awk '{print $3}') if [[ x"${param}" == x"bbr" ]]; then return 0 else return 1 fi } check_kernel_version() { local kernel_version=$(uname -r | cut -d- -f1) if version_ge ${kernel_version} 4.9; then return 0 else return 1 fi } install_elrepo() { if centosversion 5; then echo -e "${red}Error:${plain} not supported CentOS 5." exit 1 fi rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org if centosversion 6; then rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm elif centosversion 7; then rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm fi if [ ! -f /etc/yum.repos.d/elrepo.repo ]; then echo -e "${red}Error:${plain} Install elrepo failed, please check it." exit 1 fi } sysctl_config() { sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf echo "net.core.default_qdisc = fq" >> /etc/sysctl.conf echo "net.ipv4.tcp_congestion_control = bbr" >> /etc/sysctl.conf sysctl -p >/dev/null 2>&1 } install_config() { if [[ x"${release}" == x"centos" ]]; then if centosversion 6; then if [ ! -f "/boot/grub/grub.conf" ]; then echo -e "${red}Error:${plain} /boot/grub/grub.conf not found, please check it." exit 1 fi sed -i 's/^default=.*/default=0/g' /boot/grub/grub.conf elif centosversion 7; then if [ ! -f "/boot/grub2/grub.cfg" ]; then echo -e "${red}Error:${plain} /boot/grub2/grub.cfg not found, please check it." exit 1 fi grub2-set-default 0 fi elif [[ x"${release}" == x"debian" || x"${release}" == x"ubuntu" ]]; then /usr/sbin/update-grub fi } reboot_os() { echo echo -e "${green}Info:${plain} The system needs to reboot." read -p "Do you want to restart system? [y/n]" is_reboot if [[ ${is_reboot} == "y" || ${is_reboot} == "Y" ]]; then reboot else echo -e "${green}Info:${plain} Reboot has been canceled..." exit 0 fi } install_bbr() { check_bbr_status if [ $? -eq 0 ]; then echo echo -e "${green}Info:${plain} TCP BBR has already been installed. nothing to do..." exit 0 fi check_kernel_version if [ $? -eq 0 ]; then echo echo -e "${green}Info:${plain} Your kernel version is greater than 4.9, directly setting TCP BBR..." sysctl_config echo -e "${green}Info:${plain} Setting TCP BBR completed..." exit 0 fi if [[ x"${release}" == x"centos" ]]; then install_elrepo [ ! "$(command -v yum-config-manager)" ] && yum install -y yum-utils > /dev/null 2>&1 [ x"$(yum-config-manager elrepo-kernel | grep -w enabled | awk '{print $3}')" != x"True" ] && yum-config-manager --enable elrepo-kernel > /dev/null 2>&1 yum -y install kernel-ml kernel-ml-devel if [ $? -ne 0 ]; then echo -e "${red}Error:${plain} Install latest kernel failed, please check it." exit 1 fi elif [[ x"${release}" == x"debian" || x"${release}" == x"ubuntu" ]]; then [[ ! -e "/usr/bin/wget" ]] && apt-get -y update && apt-get -y install wget echo -e "${green}Info:${plain} Getting latest kernel version..." get_latest_version if [ -n ${modules_deb_name} ]; then wget -c -t3 -T60 -O ${deb_kernel_modules_name} ${deb_kernel_modules_url} if [ $? -ne 0 ]; then echo -e "${red}Error:${plain} Download ${deb_kernel_modules_name} failed, please check it." exit 1 fi fi wget -c -t3 -T60 -O ${deb_kernel_name} ${deb_kernel_url} if [ $? -ne 0 ]; then echo -e "${red}Error:${plain} Download ${deb_kernel_name} failed, please check it." exit 1 fi [ -f ${deb_kernel_modules_name} ] && dpkg -i ${deb_kernel_modules_name} dpkg -i ${deb_kernel_name} rm -f ${deb_kernel_name} ${deb_kernel_modules_name} else echo -e "${red}Error:${plain} OS is not be supported, please change to CentOS/Debian/Ubuntu and try again." exit 1 fi install_config sysctl_config reboot_os } clear echo "---------- System Information ----------" echo " OS : $opsy" echo " Arch : $arch ($lbit Bit)" echo " Kernel : $kern" echo "----------------------------------------" echo " Auto install latest kernel for TCP BBR" echo echo " URL: https://teddysun.com/489.html" echo "----------------------------------------" echo echo "Press any key to start...or Press Ctrl+C to cancel" char=`get_char` install_bbr 2>&1 | tee ${cur_dir}/install_bbr.log
