online 2欧独服安装bbr

1、下载内核

wget http://mirror.rc.usf.edu/compute_lock/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-5.2.2-1.el7.elrepo.x86_64.rpm

1	wget http://mirror.rc.usf.edu/compute_lock/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-5.2.2-1.el7.elrepo.x86_64.rpm

2、安装

yum install kernel-ml-5.2.2-1.el7.elrepo.x86_64.rpm -y

1	yum install kernel-ml-5.2.2-1.el7.elrepo.x86_64.rpm -y

3、查看一下内核启动顺序

awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg

1	awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg

CentOS Linux (5.2.2-1.el7.elrepo.x86_64) 7 (Core) CentOS Linux
….

4、修改grub配置文件

vi /etc/default/grub

1	vi /etc/default/grub

将 GRUB_DEFAULT=saved 改为 GRUB_DEFAULT=0

0为刚刚第3步显示的顺序

5、更新配置

grub2-mkconfig -o /boot/grub2/grub.cfg
grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg

1 2	grub2-mkconfig -o /boot/grub2/grub.cfg grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg

重启

6、uname -r 查看内核是否显示为 CentOS Linux (5.2.2-1.el7.elrepo.x86_64) 7 (Core) CentOS Linux

7、开启bbr

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf

echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf

sysctl -p

8、验证

lsmod | grep tcp_bbr

1	lsmod \| grep tcp_bbr