centos7升级内核 ，wireguard优化

一、centos7升级内核

uname -r 查看内核版本

升级前

 

 

 

升级后

 

 

参考链接： https://www.cnblogs.com/rick-zhang/p/14944510.html

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# 启用 ELRepo 仓库 rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm yum --disablerepo="*" --enablerepo="elrepo-kernel" list available yum --enablerepo=elrepo-kernel install kernel-ml   vi /etc/default/grub 修改GRUB_DEFAULT=0   # 重新创建内核配置 grub2-mkconfig -o /boot/grub2/grub.cfg   reboot

　　

 

2、wireguard优化

内核升级后，wireguard无法启动，报错信息如下

 

 

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# wg-quick up /etc/wireguard/wg0.conf [#] ip link add wg0 type wireguard RTNETLINK answers: Operation not supported Unable to access interface: Protocol not supported [#] ip link delete dev wg0 Cannot find device "wg0"

　

参考链接：https://www.wireguard.com/install/　

重新安装后恢复

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yum install yum-utils epel-release yum-config-manager --setopt=centosplus.includepkgs=kernel-plus --enablerepo=centosplus --save sed -e 's/^DEFAULTKERNEL=kernel$/DEFAULTKERNEL=kernel-plus/' -i /etc/sysconfig/kernel yum install kernel-plus wireguard-tools reboot

　　

 

重新添加ip转发

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vi /etc/sysctl.conf net.ipv4.ip_forward=1   sysctl -p echo 1 > /proc/sys/net/ipv4/ip_forward