导入elrepo源所需的公钥
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
安装centos7专用elrepo源
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm
安装最新稳定版内核
yum -y --enablerepo=elrepo-kernel install kernel-ml-devel kernel-ml
查看系统启动项
grep menuentry /boot/grub2/grub.cfg
将最新内核设为默认启动内核
grub2-set-default 'CentOS Linux (5.6.5-1.el7.elrepo.x86_64) 7 (Core)'
确认无误后重启linux
grub2-editenv list
确认无误后
reboot
卸载旧内核和旧工具包
rpm -qa | grep kernel
查看所有内核
yum remove ...
删除旧内核和工具包
安装新内核工具包
yum -y --enablerepo=elrepo-kernel install kernel-ml-tools.x86_64
开启BBR
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p
查看BBR状态
lsmod |grep bbr