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ubuntu20開啟bbr

在Ubuntu 20上開啟BBR,首先更新系統(tǒng),然后安裝sysctltcp_bbr工具,最后編輯/etc/sysctl.conf文件啟用BBR。

在Ubuntu服務(wù)器上開啟BBR,可以有效提高網(wǎng)絡(luò)傳輸效率,BBR(Bottleneck Bandwidth and RTT)是Google開發(fā)的一種新型擁塞控制算法,它可以充分利用帶寬,降低延遲,提高吞吐量,本文將詳細(xì)介紹如何在Ubuntu服務(wù)器上開啟BBR的方法。

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安裝內(nèi)核4.9及以上版本

要開啟BBR,首先需要安裝內(nèi)核4.9及以上版本,可以通過以下命令查看當(dāng)前內(nèi)核版本:

uname r

如果當(dāng)前內(nèi)核版本低于4.9,可以通過以下命令升級內(nèi)核:

1、更新系統(tǒng)軟件包列表:

sudo aptget update

2、安裝內(nèi)核升級工具:

sudo aptget install buildessential linuxheadersgeneric

3、下載內(nèi)核4.9源碼:

wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux4.9.tar.xz

4、解壓縮源碼包:

tar xf linux4.9.tar.xz

5、進(jìn)入解壓后的目錄:

cd linux4.9

6、配置內(nèi)核選項:

make menuconfig

在菜單中選擇“Networking options” > “TCP congestion control”,勾選“BBR (Newreno)”,然后保存退出。

7、編譯并安裝新內(nèi)核:

make j$(nproc) && sudo make modules_install && sudo make install && sudo updategrub

重啟服務(wù)器后,使用以下命令查看新內(nèi)核版本:

uname r

啟用BBR模塊

安裝新內(nèi)核后,需要啟用BBR模塊,可以通過以下命令啟用:

1、查看當(dāng)前可用的內(nèi)核模塊:

lsmod | grep bbr

如果沒有輸出,說明BBR模塊未啟用,接下來,我們需要創(chuàng)建一個新的配置文件來啟用BBR模塊,創(chuàng)建一個名為bbr.sh的文件,內(nèi)容如下:

#!/bin/bash
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl p /etc/sysctl.conf

給腳本添加可執(zhí)行權(quán)限:

chmod +x bbr.sh

2、運行腳本啟用BBR模塊:

sudo ./bbr.sh

驗證BBR是否生效

要驗證BBR是否生效,可以使用ping命令進(jìn)行測試,可以分別對本地和遠(yuǎn)程服務(wù)器進(jìn)行測試:

1、測試本地服務(wù)器:

ping c 10 i 0.2 w 1 http://localhost/path/to/resource || echo "Failed to send packets." && exit 1; sleep 2; echo "Done testing." || exit 1; sleep 2; echo "All tests passed." || exit 1; sleep 2; echo "Testing completed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill SIGINT $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep 2; echo "Process terminated successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill KILL $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep 2; echo "Process terminated successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill KILL $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep 2; echo "Process terminated successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill KILL $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep 2; echo "Process terminated successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill KILL $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep 2; echo "Process terminated successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill KILL $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep 2; echo "Process terminated successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill KILL $$ || exit 1; sleep 2; echo "Process killed successfully." || exit 1; sleep 2; echo "Exiting." || exit 1; sleep 2; pkill TERM $$ || exit 1; sleep

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