Centos7.6如何开启BBR加速-文档中心-青果网络

1.输入该命令按回车键：`rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517324596e.jpg)

2.输入该命令按回车键：`rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517ad51adf.jpg)

3.输入该命令按回车键：`yum --enablerepo=elrepo-kernel install kernel-lt -y`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/1625172ced83b.jpg)

4.输入该命令按回车键查看记录内核名称：`cat /boot/grub2/grub.cfg | grep menuentry`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/1625175f7e7a6.jpg)

5.根据查找内核名称设置输入该命令按回车键：`grub2-set-default 'CentOS Linux (5.4.260-1.el7.elrepo.x86_64) 7 (Core)`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/16251783aab52.jpg)

6.输入该命令按回车键：`grub2-editenv list`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517dc93df3.jpg)

7.输入该命令按回车键重启后再连接：`reboot`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/1625171a14456.jpg)

8.输入该命令按回车键：`echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517633fedc.jpg)

9.输入该命令按回车键：`echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517cff34a2.jpg)

10.输入该命令按回车键：`sysctl -p`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517b18e8f3.jpg)

11.输入该命令按回车键出现如图提示表示开启成功：`sysctl -n net.ipv4.tcp_congestion_control`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-11-20/162517e4ddb85.jpg)