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install_kernel.sh
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install_kernel.sh
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#!/bin/bash
#
# Install linux kernel for TCP BBR and BBR Plus
#
# Copyright (C) 2021-2023 JinWYP
#
# 4.4 LTS 4.9 LTS 4.14 LTS 4.19 LTS
# 5.4 LTS 5.10 LTS
# 4.x版本内核最新的longterm版本是4.19.113,安装的话只能找个4.19的rpm包来安装了
# 从 Linux 4.9 版本开始，TCP BBR 就已经成为了 Linux 系统内核的一部分。因此，开启 BBR 的首要前提就是当前系统内核版本大于等于 4.9
# Linux 内核 5.6 正式发布了，内置了 wireguard module
# Linux 5.6 引入 FQ-PIE 数据包调度程序以帮助应对 Bufferbloat
# 5.5内核支持cake队列
# 自来光大佬： xamod内核5.8默认队列算法已经改为 fq_pie 之前是cake
# centos8 安装完成默认内核 kernel-core-4.18.0-240.15.1.el8_3.x86_64, kernel-modules-4.18.0-240.15.1.el8_3.x86_64
# ubuntu16 安装完成默认内核 linux-generic 4.4.0.210, linux-headers-4.4.0-210
# ubuntu18 安装完成默认内核 linux-generic 4.15.0.140, linux-headers-4.15.0-140
# ubuntu20 安装完成默认内核 linux-image-5.4.0-70-generic , linux-headers-5.4.0-70
# debian10 安装完成默认内核 4.19.0-16-amd64
# UJX6N 编译的bbr plus 内核 5.10.27-bbrplus 5.9.16 5.4.86
# UJX6N 编译的bbr plus 内核 4.19.164 4.14.213 4.9.264-1.bbrplus
# https://github.com/cx9208/bbrplus/issues/27
# BBR 速度评测
# https://www.shopee6.com/web/web-tutorial/bbr-vs-plus-vs-bbr2.html
# https://hostloc.com/thread-644985-1-1.html
# https://dropbox.tech/infrastructure/evaluating-bbrv2-on-the-dropbox-edge-network
export LC_ALL=C
export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8
if [[ $(/usr/bin/id -u) -ne 0 ]]; then
sudoCmd="sudo"
else
sudoCmd=""
fi
uninstall() {
${sudoCmd} $(which rm) -rf $1
printf "File or Folder Deleted: %s\n" $1
}
# fonts color
red(){
echo -e "\033[31m\033[01m$1\033[0m"
}
green(){
echo -e "\033[32m\033[01m$1\033[0m"
}
yellow(){
echo -e "\033[33m\033[01m$1\033[0m"
}
blue(){
echo -e "\033[34m\033[01m$1\033[0m"
}
bold(){
echo -e "\033[1m\033[01m$1\033[0m"
}
Green_font_prefix="\033[32m"
Red_font_prefix="\033[31m"
Green_background_prefix="\033[42;37m"
Red_background_prefix="\033[41;37m"
Font_color_suffix="\033[0m"
osInfo=""
osRelease=""
osReleaseVersion=""
osReleaseVersionNo=""
osReleaseVersionCodeName="CodeName"
osSystemPackage=""
osSystemMdPath=""
osSystemShell="bash"
osKernelVersionFull=$(uname -r)
osKernelVersionBackup=$(uname -r | awk -F "-" '{print $1}')
osKernelVersionShort=$(uname -r | cut -d- -f1 | awk -F "." '{print $1"."$2}')
osKernelBBRStatus=""
systemBBRRunningStatus="no"
systemBBRRunningStatusText=""
# 检测系统版本号
getLinuxOSVersion(){
if [[ -s /etc/redhat-release ]]; then
osReleaseVersion=$(grep -oE '[0-9.]+' /etc/redhat-release)
else
osReleaseVersion=$(grep -oE '[0-9.]+' /etc/issue)
fi
# https://unix.stackexchange.com/questions/6345/how-can-i-get-distribution-name-and-version-number-in-a-simple-shell-script
if [ -f /etc/os-release ]; then
# freedesktop.org and systemd
source /etc/os-release
osInfo=$NAME
osReleaseVersionNo=$VERSION_ID
if [ -n $VERSION_CODENAME ]; then
osReleaseVersionCodeName=$VERSION_CODENAME
fi
elif type lsb_release >/dev/null 2>&1; then
# linuxbase.org
osInfo=$(lsb_release -si)
osReleaseVersionNo=$(lsb_release -sr)
elif [ -f /etc/lsb-release ]; then
# For some versions of Debian/Ubuntu without lsb_release command
. /etc/lsb-release
osInfo=$DISTRIB_ID
osReleaseVersionNo=$DISTRIB_RELEASE
elif [ -f /etc/debian_version ]; then
# Older Debian/Ubuntu/etc.
osInfo=Debian
osReleaseVersion=$(cat /etc/debian_version)
osReleaseVersionNo=$(sed 's/\..*//' /etc/debian_version)
elif [ -f /etc/redhat-release ]; then
osReleaseVersion=$(grep -oE '[0-9.]+' /etc/redhat-release)
else
# Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
osInfo=$(uname -s)
osReleaseVersionNo=$(uname -r)
fi
}
# 检测系统发行版代号
function getLinuxOSRelease(){
if [[ -f /etc/redhat-release ]]; then
osRelease="centos"
osSystemPackage="yum"
osSystemMdPath="/usr/lib/systemd/system/"
osReleaseVersionCodeName=""
elif cat /etc/issue | grep -Eqi "debian|raspbian"; then
osRelease="debian"
osSystemPackage="apt-get"
osSystemMdPath="/lib/systemd/system/"
osReleaseVersionCodeName="buster"
elif cat /etc/issue | grep -Eqi "ubuntu"; then
osRelease="ubuntu"
osSystemPackage="apt-get"
osSystemMdPath="/lib/systemd/system/"
osReleaseVersionCodeName="bionic"
elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then
osRelease="centos"
osSystemPackage="yum"
osSystemMdPath="/usr/lib/systemd/system/"
osReleaseVersionCodeName=""
elif cat /proc/version | grep -Eqi "debian|raspbian"; then
osRelease="debian"
osSystemPackage="apt-get"
osSystemMdPath="/lib/systemd/system/"
osReleaseVersionCodeName="buster"
elif cat /proc/version | grep -Eqi "ubuntu"; then
osRelease="ubuntu"
osSystemPackage="apt-get"
osSystemMdPath="/lib/systemd/system/"
osReleaseVersionCodeName="bionic"
elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then
osRelease="centos"
osSystemPackage="yum"
osSystemMdPath="/usr/lib/systemd/system/"
osReleaseVersionCodeName=""
fi
getLinuxOSVersion
virt_check
[[ -z $(echo $SHELL|grep zsh) ]] && osSystemShell="bash" || osSystemShell="zsh"
echo "OS info: ${osInfo}, ${osRelease}, ${osReleaseVersion}, ${osReleaseVersionNo}, ${osReleaseVersionCodeName}, ${osSystemShell}, ${osSystemPackage}, ${osSystemMdPath}"
}
virt_check(){
# if hash ifconfig 2>/dev/null; then
# eth=$(ifconfig)
# fi
virtualx=$(dmesg) 2>/dev/null
if [ $(which dmidecode) ]; then
sys_manu=$(dmidecode -s system-manufacturer) 2>/dev/null
sys_product=$(dmidecode -s system-product-name) 2>/dev/null
sys_ver=$(dmidecode -s system-version) 2>/dev/null
else
sys_manu=""
sys_product=""
sys_ver=""
fi
if grep docker /proc/1/cgroup -qa; then
virtual="Docker"
elif grep lxc /proc/1/cgroup -qa; then
virtual="Lxc"
elif grep -qa container=lxc /proc/1/environ; then
virtual="Lxc"
elif [[ -f /proc/user_beancounters ]]; then
virtual="OpenVZ"
elif [[ "$virtualx" == *kvm-clock* ]]; then
virtual="KVM"
elif [[ "$cname" == *KVM* ]]; then
virtual="KVM"
elif [[ "$cname" == *QEMU* ]]; then
virtual="KVM"
elif [[ "$virtualx" == *"VMware Virtual Platform"* ]]; then
virtual="VMware"
elif [[ "$virtualx" == *"Parallels Software International"* ]]; then
virtual="Parallels"
elif [[ "$virtualx" == *VirtualBox* ]]; then
virtual="VirtualBox"
elif [[ -e /proc/xen ]]; then
virtual="Xen"
elif [[ "$sys_manu" == *"Microsoft Corporation"* ]]; then
if [[ "$sys_product" == *"Virtual Machine"* ]]; then
if [[ "$sys_ver" == *"7.0"* || "$sys_ver" == *"Hyper-V" ]]; then
virtual="Hyper-V"
else
virtual="Microsoft Virtual Machine"
fi
fi
else
virtual="Dedicated母鸡"
fi
}
function installSoftDownload(){
if [[ "${osRelease}" == "debian" || "${osRelease}" == "ubuntu" ]]; then
if [[ "${osRelease}" == "debian" ]]; then
echo "deb http://deb.debian.org/debian buster-backports main contrib non-free" > /etc/apt/sources.list.d/buster-backports.list
echo "deb-src http://deb.debian.org/debian buster-backports main contrib non-free" >> /etc/apt/sources.list.d/buster-backports.list
${sudoCmd} apt update
fi
if ! dpkg -l | grep -qw wget; then
${osSystemPackage} -y install wget curl git
fi
if ! dpkg -l | grep -qw bc; then
${osSystemPackage} -y install bc
# https://stackoverflow.com/questions/11116704/check-if-vt-x-is-activated-without-having-to-reboot-in-linux
${osSystemPackage} -y install cpu-checker
fi
if ! dpkg -l | grep -qw ca-certificates; then
${osSystemPackage} -y install ca-certificates dmidecode
update-ca-certificates
fi
elif [[ "${osRelease}" == "centos" ]]; then
if ! rpm -qa | grep -qw wget; then
${osSystemPackage} -y install wget curl git bc
fi
if ! rpm -qa | grep -qw bc; then
${osSystemPackage} -y install bc
fi
# 处理ca证书
if ! rpm -qa | grep -qw ca-certificates; then
${osSystemPackage} -y install ca-certificates dmidecode
update-ca-trust force-enable
fi
fi
}
function rebootSystem(){
if [ -z $1 ]; then
red "请检查上面的信息 是否有新内核版本, 老内核版本 ${osKernelVersionBackup} 是否已经卸载!"
echo
red "请注意检查 是否把新内核也误删卸载了, 无新内核 ${linuxKernelToInstallVersionFull} 不要重启, 可重新安装内核后再重启! "
fi
echo
read -p "是否立即重启? 请输入[Y/n]?" isRebootInput
isRebootInput=${isRebootInput:-Y}
if [[ $isRebootInput == [Yy] ]]; then
${sudoCmd} reboot
else
exit
fi
}
function promptContinueOpeartion(){
read -p "是否继续操作? 直接回车默认继续操作, 请输入[Y/n]:" isContinueInput
isContinueInput=${isContinueInput:-Y}
if [[ $isContinueInput == [Yy] ]]; then
echo ""
else
exit
fi
}
# https://stackoverflow.com/questions/4023830/how-to-compare-two-strings-in-dot-separated-version-format-in-bash
versionCompare () {
if [[ $1 == $2 ]]; then
return 0
fi
local IFS=.
local i ver1=($1) ver2=($2)
# fill empty fields in ver1 with zeros
for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
do
ver1[i]=0
done
for ((i=0; i<${#ver1[@]}; i++))
do
if [[ -z ${ver2[i]} ]]
then
# fill empty fields in ver2 with zeros
ver2[i]=0
fi
if ((10#${ver1[i]} > 10#${ver2[i]}))
then
return 1
fi
if ((10#${ver1[i]} < 10#${ver2[i]}))
then
return 2
fi
done
return 0
}
versionCompareWithOp () {
versionCompare $1 $2
case $? in
0) op='=';;
1) op='>';;
2) op='<';;
esac
if [[ $op != $3 ]]; then
# echo "Version Number Compare Fail: Expected '$3', Actual '$op', Arg1 '$1', Arg2 '$2'"
return 1
else
# echo "Version Number Compare Pass: '$1 $op $2'"
return 0
fi
}
function listAvailableLinuxKernel(){
echo
green " =================================================="
green " 状态显示--当前可以被安装的 Linux 内核: "
if [[ "${osRelease}" == "centos" ]]; then
${sudoCmd} yum --disablerepo="*" --enablerepo="elrepo-kernel" list available | grep kernel
else
if [ -z $1 ]; then
${sudoCmd} apt-cache search linux-image
else
${sudoCmd} apt-cache search linux-image | grep $1
fi
fi
green " =================================================="
echo
}
function listInstalledLinuxKernel(){
echo
green " =================================================="
green " 状态显示--当前已安装的 Linux 内核: "
echo
if [[ "${osRelease}" == "debian" || "${osRelease}" == "ubuntu" ]]; then
dpkg --get-selections | grep linux-
# dpkg -l | grep linux-
# dpkg-query -l | grep linux-
# apt list --installed | grep linux-
echo
red " 如安装内核遇到kernel linux-image linux-headers 版本不一致问题, 请手动卸载已安装的kernel"
red " 卸载内核命令1 apt remove -y --purge linux-xxx名称"
red " 卸载内核命令2 apt autoremove -y --purge linux-xxx名称"
elif [[ "${osRelease}" == "centos" ]]; then
${sudoCmd} rpm -qa | grep kernel
echo
red " 如安装内核遇到kernel kernel-headers kernel-devel版本不一致问题, 请手动卸载已安装的kernel"
red " 卸载内核命令 rpm --nodeps -e kernel-xxx名称"
fi
green " =================================================="
echo
}
function showLinuxKernelInfoNoDisplay(){
isKernelSupportBBRVersion="4.9"
if versionCompareWithOp "${isKernelSupportBBRVersion}" "${osKernelVersionShort}" ">"; then
echo
else
osKernelBBRStatus="BBR"
fi
if [[ ${osKernelVersionFull} == *"bbrplus"* ]]; then
osKernelBBRStatus="BBR Plus"
elif [[ ${osKernelVersionFull} == *"xanmod"* ]]; then
osKernelBBRStatus="BBR 和 BBR2"
fi
net_congestion_control=`cat /proc/sys/net/ipv4/tcp_congestion_control | awk '{print $1}'`
net_qdisc=`cat /proc/sys/net/core/default_qdisc | awk '{print $1}'`
net_ecn=`cat /proc/sys/net/ipv4/tcp_ecn | awk '{print $1}'`
if [[ ${osKernelVersionBackup} == *"4.14.129"* ]]; then
# isBBREnabled=$(grep "net.ipv4.tcp_congestion_control" /etc/sysctl.conf | awk -F "=" '{print $2}')
# isBBREnabled=$(sysctl net.ipv4.tcp_available_congestion_control | awk -F "=" '{print $2}')
isBBRTcpEnabled=$(lsmod | grep "bbr" | awk '{print $1}')
isBBRPlusTcpEnabled=$(lsmod | grep "bbrplus" | awk '{print $1}')
isBBR2TcpEnabled=$(lsmod | grep "bbr2" | awk '{print $1}')
else
isBBRTcpEnabled=$(sysctl net.ipv4.tcp_congestion_control | grep "bbr" | awk -F "=" '{print $2}' | awk '{$1=$1;print}')
isBBRPlusTcpEnabled=$(sysctl net.ipv4.tcp_congestion_control | grep "bbrplus" | awk -F "=" '{print $2}' | awk '{$1=$1;print}')
isBBR2TcpEnabled=$(sysctl net.ipv4.tcp_congestion_control | grep "bbr2" | awk -F "=" '{print $2}' | awk '{$1=$1;print}')
fi
if [[ ${net_ecn} == "1" ]]; then
systemECNStatusText="已开启"
elif [[ ${net_ecn} == "0" ]]; then
systemECNStatusText="已关闭"
elif [[ ${net_ecn} == "2" ]]; then
systemECNStatusText="只对入站请求开启(默认值)"
else
systemECNStatusText=""
fi
if [[ ${net_congestion_control} == "bbr" ]]; then
if [[ ${isBBRTcpEnabled} == *"bbr"* ]]; then
systemBBRRunningStatus="bbr"
systemBBRRunningStatusText="BBR 已启动成功"
else
systemBBRRunningStatusText="BBR 启动失败"
fi
elif [[ ${net_congestion_control} == "bbrplus" ]]; then
if [[ ${isBBRPlusTcpEnabled} == *"bbrplus"* ]]; then
systemBBRRunningStatus="bbrplus"
systemBBRRunningStatusText="BBR Plus 已启动成功"
else
systemBBRRunningStatusText="BBR Plus 启动失败"
fi
elif [[ ${net_congestion_control} == "bbr2" ]]; then
if [[ ${isBBR2TcpEnabled} == *"bbr2"* ]]; then
systemBBRRunningStatus="bbr2"
systemBBRRunningStatusText="BBR2 已启动成功"
else
systemBBRRunningStatusText="BBR2 启动失败"
fi
else
systemBBRRunningStatusText="未启动加速模块"
fi
}
function showLinuxKernelInfo(){
# https://stackoverflow.com/questions/8654051/how-to-compare-two-floating-point-numbers-in-bash
# https://stackoverflow.com/questions/229551/how-to-check-if-a-string-contains-a-substring-in-bash
isKernelSupportBBRVersion="4.9"
green " =================================================="
green " 状态显示--当前Linux 内核版本: ${osKernelVersionShort} , $(uname -r) "
if versionCompareWithOp "${isKernelSupportBBRVersion}" "${osKernelVersionShort}" ">"; then
green " 当前系统内核低于4.9, 不支持开启 BBR "
else
green " 当前系统内核高于4.9, 支持开启 BBR, ${systemBBRRunningStatusText}"
fi
if [[ ${osKernelVersionFull} == *"xanmod"* ]]; then
green " 当前系统内核已支持开启 BBR2, ${systemBBRRunningStatusText}"
else
green " 当前系统内核不支持开启 BBR2"
fi
if [[ ${osKernelVersionFull} == *"bbrplus"* ]]; then
green " 当前系统内核已支持开启 BBR Plus, ${systemBBRRunningStatusText}"
else
green " 当前系统内核不支持开启 BBR Plus"
fi
# sysctl net.ipv4.tcp_available_congestion_control 返回值 net.ipv4.tcp_available_congestion_control = bbr cubic reno 或 reno cubic bbr
# sysctl net.ipv4.tcp_congestion_control 返回值 net.ipv4.tcp_congestion_control = bbr
# sysctl net.core.default_qdisc 返回值 net.core.default_qdisc = fq
# lsmod | grep bbr 返回值 tcp_bbr 20480 3 或 tcp_bbr 20480 1 注意：并不是所有的 VPS 都会有此返回值，若没有也属正常。
# isFlagBbr=$(sysctl net.ipv4.tcp_congestion_control | awk '{print $3}')
# if [[ (${isFlagBbr} == *"bbr"*) && (${isFlagBbr} != *"bbrplus"*) && (${isFlagBbr} != *"bbr2"*) ]]; then
# green " 状态显示--是否开启BBR: 已开启 "
# else
# green " 状态显示--是否开启BBR: 未开启 "
# fi
# if [[ ${isFlagBbr} == *"bbrplus"* ]]; then
# green " 状态显示--是否开启BBR Plus: 已开启 "
# else
# green " 状态显示--是否开启BBR Plus: 未开启 "
# fi
# if [[ ${isFlagBbr} == *"bbr2"* ]]; then
# green " 状态显示--是否开启BBR2: 已开启 "
# else
# green " 状态显示--是否开启BBR2: 未开启 "
# fi
green " =================================================="
echo
}
function enableBBRSysctlConfig(){
# https://hostloc.com/thread-644985-1-1.html
# 优质线路用5.5+cake和原版bbr带宽跑的更足，不过cake的话就算高峰也不会像原版bbr那样跑不动，相比plus能慢些，但是区别不大，
# bbr plus的话美西或者一些延迟高的，用起来更好，锐速针对丢包高的有奇效
# 带宽大，并且延迟低不丢包的话5.5+cake在我这比较好，延迟高用plus更好，丢包多锐速最好. 一般130ms以下用cake不错，以上的话用plus更好些
# https://github.com/xanmod/linux/issues/26
# 说白了 bbrplus 就是改了点东西，然后那部分修改在 5.1 内核里合并进去了, 5.1 及以上的内核里自带的 bbr 已经包含了所谓的 bbrplus 的修改。
# PS：bbr 是一直在修改的，比如说 5.0 内核的 bbr，4.15 内核的 bbr 和 4.9 内核的 bbr 其实都是不一样的
# https://sysctl-explorer.net/net/ipv4/tcp_ecn/
removeBbrSysctlConfig
currentBBRText="bbr"
currentQueueText="fq"
currentECNValue="2"
currentECNText=""
if [ $1 = "bbrplus" ]; then
currentBBRText="bbrplus"
else
echo
echo " 请选择开启 (1) BBR 还是 (2) BBR2 网络加速 "
red " 选择 1 BBR 需要内核在 4.9 以上"
red " 选择 2 BBR2 需要内核为 XanMod "
read -p "请选择? 直接回车默认选1 BBR, 请输入[1/2]:" BBRTcpInput
BBRTcpInput=${BBRTcpInput:-1}
if [[ $BBRTcpInput == [2] ]]; then
if [[ ${osKernelVersionFull} == *"xanmod"* ]]; then
currentBBRText="bbr2"
echo
echo " 请选择是否开启 ECN, (1) 关闭 (2) 开启 (3) 仅对入站请求开启 "
red " 注意: 开启 ECN 可能会造成网络设备无法访问"
read -p "请选择? 直接回车默认选1 关闭ECN, 请输入[1/2]:" ECNTcpInput
ECNTcpInput=${ECNTcpInput:-1}
if [[ $ECNTcpInput == [2] ]]; then
currentECNValue="1"
currentECNText="+ ECN"
elif [[ $ECNTcpInput == [3] ]]; then
currentECNValue="2"
else
currentECNValue="0"
fi
else
echo
red " 当前系统内核没有安装 XanMod 内核, 无法开启BBR2, 改为开启BBR"
echo
currentBBRText="bbr"
fi
else
currentBBRText="bbr"
fi
fi
echo
echo " 请选择队列算法 (1) FQ, (2) FQ-Codel, (3) FQ-PIE, (4) CAKE "
red " 选择 2 FQ-Codel 队列算法 需要内核在 4.13 以上"
red " 选择 3 FQ-PIE 队列算法 需要内核在 5.6 以上"
red " 选择 4 CAKE 队列算法 需要内核在 5.5 以上"
read -p "请选择队列算法? 直接回车默认选1 FQ, 请输入[1/2/3/4]:" BBRQueueInput
BBRQueueInput=${BBRQueueInput:-1}
if [[ $BBRQueueInput == [2] ]]; then
currentQueueText="fq_codel"
elif [[ $BBRQueueInput == [3] ]]; then
currentQueueText="fq_pie"
elif [[ $BBRQueueInput == [4] ]]; then
currentQueueText="cake"
else
currentQueueText="fq"
fi
echo "net.core.default_qdisc=${currentQueueText}" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=${currentBBRText}" >> /etc/sysctl.conf
echo "net.ipv4.tcp_ecn=${currentECNValue}" >> /etc/sysctl.conf
isSysctlText=$(sysctl -p 2>&1 | grep "No such file")
echo
if [[ -z "$isSysctlText" ]]; then
green " 已成功开启 ${currentBBRText} + ${currentQueueText} ${currentECNText} "
else
green " 已成功开启 ${currentBBRText} ${currentECNText}"
red " 但当前内核版本过低, 开启队列算法 ${currentQueueText} 失败! "
red "请重新运行脚本, 选择'2 开启 BBR 加速'后, 务必再选择 (1)FQ 队列算法 !"
fi
echo
read -p "是否优化系统网络配置? 直接回车默认优化, 请输入[Y/n]:" isOptimizingSystemInput
isOptimizingSystemInput=${isOptimizingSystemInput:-Y}
if [[ $isOptimizingSystemInput == [Yy] ]]; then
addOptimizingSystemConfig "cancel"
else
echo
echo "sysctl -p"
echo
sysctl -p
echo
fi
}
# 卸载 bbr+锐速 配置
function removeBbrSysctlConfig(){
sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_ecn/d' /etc/sysctl.conf
if [[ -e /appex/bin/lotServer.sh ]]; then
bash <(wget --no-check-certificate -qO- https://git.io/lotServerInstall.sh) uninstall
fi
}
function removeOptimizingSystemConfig(){
removeBbrSysctlConfig
sed -i '/fs.file-max/d' /etc/sysctl.conf
sed -i '/fs.inotify.max_user_instances/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_syncookies/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_fin_timeout/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_tw_reuse/d' /etc/sysctl.conf
sed -i '/net.ipv4.ip_local_port_range/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_max_syn_backlog/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_max_tw_buckets/d' /etc/sysctl.conf
sed -i '/net.ipv4.route.gc_timeout/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_syn_retries/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_synack_retries/d' /etc/sysctl.conf
sed -i '/net.core.somaxconn/d' /etc/sysctl.conf
sed -i '/net.core.netdev_max_backlog/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_timestamps/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_max_orphans/d' /etc/sysctl.conf
sed -i '/net.ipv4.ip_forward/d' /etc/sysctl.conf
sed -i '/1000000/d' /etc/security/limits.conf
sed -i '/1000000/d' /etc/profile
echo
green " 已删除当前系统的网络优化配置 "
echo
}
function addOptimizingSystemConfig(){
# https://ustack.io/2019-11-21-Linux%E5%87%A0%E4%B8%AA%E9%87%8D%E8%A6%81%E7%9A%84%E5%86%85%E6%A0%B8%E9%85%8D%E7%BD%AE.html
# https://www.cnblogs.com/xkus/p/7463135.html
# 优化系统配置
if grep -q "1000000" "/etc/profile"; then
echo
green " 系统网络配置 已经优化过, 不需要再次优化 "
echo
sysctl -p
echo
exit
fi
if [ -z $1 ]; then
removeOptimizingSystemConfig
fi
echo
green " 开始准备 优化系统网络配置 "
cat >> /etc/sysctl.conf <<-EOF
fs.file-max = 1000000
fs.inotify.max_user_instances = 8192
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_reuse = 1
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.route.gc_timeout = 100
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.core.somaxconn = 32768
net.core.netdev_max_backlog = 32768
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_max_orphans = 32768
# forward ipv4
net.ipv4.ip_forward = 1
EOF
cat >> /etc/security/limits.conf <<-EOF
* soft nofile 1000000
* hard nofile 1000000
EOF
echo "ulimit -SHn 1000000" >> /etc/profile
source /etc/profile
echo
sysctl -p
echo
green " 已完成 系统网络配置的优化 "
echo
rebootSystem "noinfo"
}
function startIpv4(){
cat >> /etc/sysctl.conf <<-EOF
net.ipv4.tcp_retries2 = 8
net.ipv4.tcp_slow_start_after_idle = 0
# forward ipv4
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding = 1
EOF
}
isInstallFromRepo="no"
userHomePath="${HOME}/download_linux_kernel"
linuxKernelByUser="elrepo"
linuxKernelToBBRType=""
linuxKernelToInstallVersion="5.10"
linuxKernelToInstallVersionFull=""
elrepo_kernel_name="kernel-ml"
elrepo_kernel_version="5.4.110"
altarch_kernel_name="kernel"
altarch_kernel_version="5.4.105"
function downloadFile(){
tempUrl=$1
tempFilename=$(echo "${tempUrl##*/}")
echo "${userHomePath}/${linuxKernelToInstallVersionFull}/${tempFilename}"
if [ -f "${userHomePath}/${linuxKernelToInstallVersionFull}/${tempFilename}" ]; then
green "文件已存在, 不需要下载, 文件原下载地址: $1 "
else
green "文件下载中... 下载地址: $1 "
wget -N --no-check-certificate -P ${userHomePath}/${linuxKernelToInstallVersionFull} $1
fi
echo
}
function installKernel(){
if [ "${linuxKernelToInstallVersion}" = "5.14" ]; then
bbrplusKernelVersion="5.14.15-1"
elif [ "${linuxKernelToInstallVersion}" = "5.10" ]; then
bbrplusKernelVersion="5.10.76-1"
elif [ "${linuxKernelToInstallVersion}" = "5.4" ]; then
bbrplusKernelVersion="5.4.156-1"
elif [ "${linuxKernelToInstallVersion}" = "4.19" ]; then
bbrplusKernelVersion="4.19.214-1"
elif [ "${linuxKernelToInstallVersion}" = "4.14" ]; then
bbrplusKernelVersion="4.14.253-1"
elif [ "${linuxKernelToInstallVersion}" = "4.9" ]; then
bbrplusKernelVersion="4.9.288-1"
fi
if [[ "${osRelease}" == "debian" || "${osRelease}" == "ubuntu" ]]; then
installDebianUbuntuKernel
elif [[ "${osRelease}" == "centos" ]]; then
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
if [ "${linuxKernelToBBRType}" = "xanmod" ]; then
red " xanmod 内核不支持 Centos 系统安装"
exit 255
fi
if [ "${isInstallFromRepo}" = "yes" ]; then
getLatestCentosKernelVersion
installCentosKernelFromRepo
else
if [ "${linuxKernelToBBRType}" = "bbrplus" ]; then
echo
else
getLatestCentosKernelVersion "manual"
fi
installCentosKernelManual
fi
fi
}
function getLatestCentosKernelVersion(){
# https://stackoverflow.com/questions/4988155/is-there-a-bash-command-that-can-tell-the-size-of-a-shell-variable
elrepo_kernel_version_lt_array=($(wget -qO- https://elrepo.org/linux/kernel/el8/x86_64/RPMS | awk -F'\"kernel-lt-' '/>kernel-lt-[4-9]./{print $2}' | cut -d- -f1 | sort -V))
# echo ${elrepo_kernel_version_lt_array[@]}
echo
if [ ${#elrepo_kernel_version_lt_array[@]} -eq 0 ]; then
red " 无法获取到 Centos elrepo 源的最新的Linux 内核 kernel-lt 版本号 "
else
# echo ${elrepo_kernel_version_lt_array[${#elrepo_kernel_version_lt_array[@]} - 1]}
elrepo_kernel_version_lt=${elrepo_kernel_version_lt_array[${#elrepo_kernel_version_lt_array[@]} - 1]}
green "Centos elrepo 源的最新的Linux 内核 kernel-lt 版本号为 ${elrepo_kernel_version_lt}"
fi
if [ -z $1 ]; then
elrepo_kernel_version_ml_array=($(wget -qO- https://elrepo.org/linux/kernel/el8/x86_64/RPMS | awk -F'>kernel-ml-' '/>kernel-ml-[4-9]./{print $2}' | cut -d- -f1 | sort -V))
if [ ${#elrepo_kernel_version_ml_array[@]} -eq 0 ]; then
red " 无法获取到 Centos elrepo 源的最新的Linux 内核 kernel-ml 版本号 "
else
elrepo_kernel_version_ml=${elrepo_kernel_version_ml_array[-1]}
green "Centos elrepo 源的最新的Linux 内核 kernel-ml 版本号为 ${elrepo_kernel_version_ml}"
fi
else
elrepo_kernel_version_ml2_array=($(wget -qO- https://fr1.teddyvps.com/kernel/el8 | awk -F'>kernel-ml-' '/>kernel-ml-[4-9]./{print $2}' | cut -d- -f1 | sort -V))
if [ ${#elrepo_kernel_version_ml2_array[@]} -eq 0 ]; then
red " 无法获取到由 Teddysun 编译的 Centos 最新的Linux 5.10 内核 kernel-ml 版本号 "
else
for ver in ${elrepo_kernel_version_ml2_array[@]}; do
if [[ ${ver} == *"5.10"* ]]; then
# echo "符合所选版本的Linux 内核版本: ${ver}"
elrepo_kernel_version_ml_Teddysun510=${ver}
fi
if [[ ${ver} == *"5.15"* ]]; then
# echo "符合所选版本的Linux 内核版本: ${ver}"
elrepo_kernel_version_ml_Teddysun515=${ver}
fi
if [[ ${ver} == *"5.14"* ]]; then
# echo "符合所选版本的Linux 内核版本: ${ver}"
elrepo_kernel_version_ml_Teddysun514=${ver}
fi
done
elrepo_kernel_version_ml_TeddysunLatest=${elrepo_kernel_version_ml2_array[-1]}
green "Centos elrepo 源的最新的Linux 内核 kernel-ml 版本号为 ${elrepo_kernel_version_ml_TeddysunLatest}"
green "由 Teddysun 编译的 Centos 最新的Linux 5.10 内核 kernel-ml 版本号为 ${elrepo_kernel_version_ml_Teddysun510}"
green "由 Teddysun 编译的 Centos 最新的Linux 5.xx 内核 kernel-ml 版本号为 ${elrepo_kernel_version_ml_Teddysun514}"
fi
fi
echo
}
function installCentosKernelFromRepo(){
green " =================================================="
green " 开始通过 elrepo 源安装 linux 内核, 不支持Centos6 "
green " =================================================="
if [ -n "${osReleaseVersionNo}" ]; then
if [ "${linuxKernelToInstallVersion}" = "5.4" ]; then
elrepo_kernel_name="kernel-lt"
elrepo_kernel_version=${elrepo_kernel_version_lt}
else
elrepo_kernel_name="kernel-ml"
elrepo_kernel_version=${elrepo_kernel_version_ml}
fi
if [ "${osKernelVersionBackup}" = "${elrepo_kernel_version}" ]; then
red "当前系统内核版本已经是 ${osKernelVersionBackup} 无需安装! "
promptContinueOpeartion
fi
linuxKernelToInstallVersionFull=${elrepo_kernel_version}