CentOS 中升级系统内核并安装 bcc-tools

说明：如下操作均为再安装的本地虚拟机中执行，生产操作慎行！！！

一、升级内核

查看当前内核版本：

[root@localhost ~]# uname -r
3.10.0-1160.el7.x86_64
[root@localhost ~]# 

升级系统：yum update -y  等待结束

安装 ELRepo

[root@localhost ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
[root@localhost ~]# rpm -Uvh https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
获取https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
准备中...                          ################################# [100%]
正在升级/安装...
   1:elrepo-release-7.0-3.el7.elrepo  ################################# [100%]
[root@localhost ~]# 

安装新内核

[root@localhost ~]# yum remove -y kernel-headers kernel-tools kernel-tools-libs
已加载插件：fastestmirror
参数 kernel-headers 没有匹配
正在解决依赖关系
--> 正在检查事务
---> 软件包 kernel-tools.x86_64.0.3.10.0-1160.24.1.el7 将被 删除
---> 软件包 kernel-tools-libs.x86_64.0.3.10.0-1160.24.1.el7 将被 删除
--> 解决依赖关系完成

...
[root@localhost ~]# yum --enablerepo=elrepo-kernel install -y kernel-ml kernel-ml-devel kernel-ml-headers
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * elrepo: mirror-hk.koddos.net
 * elrepo-kernel: mirror-hk.koddos.net
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
elrepo-kernel       
...                

更新 Grub ：

[root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.11.16-1.el7.elrepo.x86_64
Found initrd image: /boot/initramfs-5.11.16-1.el7.elrepo.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-1160.24.1.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-1160.24.1.el7.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-1160.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-1160.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-938d6e3e5c734cc4bafc19638fdae2da
Found initrd image: /boot/initramfs-0-rescue-938d6e3e5c734cc4bafc19638fdae2da.img
done
[root@localhost ~]# grub2-set-default 0
[root@localhost ~]# 

重启

[root@localhost ~]# reboot

确认内核是否升级成功

[root@localhost ~]# uname -r
5.11.16-1.el7.elrepo.x86_64
[root@localhost ~]# 

二、安装bcc-tools

安装

[root@localhost ~]# yum install -y bcc-tools

配置路径

[root@localhost ~]# export PATH=$PATH:/usr/share/bcc/tools
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/share/bcc/tools
[root@localhost ~]# 

众多工具在/usr/share/bcc/tools 路径下