Centos7 installs a high-version kernel
Because of some debugging and testing needs, our centos needs to install a high version of the kernel for real-time debugging of BCC and BPF.
Here is my installation process:
View the current OS version
Cat / etc/centos-release
CentOS Linux release 7.6.1810 (Core)
Install elrepo
Rpm-- import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
Rpm-Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
List elrepo-kernel-related software packages
[root@localhost / root] # yum-disablerepo= "*"-enablerepo= "elrepo-kernel" list available
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* elrepo-kernel: mirrors.tuna.tsinghua.edu.cn
Available Packages
Elrepo-release.noarch 7. 0-4.el7.elrepo elrepo-kernel
Kernel-lt.x86_64 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-lt-devel.x86_64 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-lt-doc.noarch 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-lt-headers.x86_64 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-lt-tools.x86_64 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-lt-tools-libs.x86_64 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-lt-tools-libs-devel.x86_64 4.4.212-1.el7.elrepo elrepo-kernel
Kernel-ml-doc.noarch 5.5.0-1.el7.elrepo elrepo-kernel
Kernel-ml-headers.x86_64 5.5.0-1.el7.elrepo elrepo-kernel
Kernel-ml-tools.x86_64 5.5.0-1.el7.elrepo elrepo-kernel
Kernel-ml-tools-libs.x86_64 5.5.0-1.el7.elrepo elrepo-kernel
Kernel-ml-tools-libs-devel.x86_64 5.5.0-1.el7.elrepo elrepo-kernel
Perf.x86_64 5.5.0-1.el7.elrepo elrepo-kernel
Python-perf.x86_64 5.5.0-1.el7.elrepo elrepo-kernel
Install the related kernel packages:
Yum-enablerepo=elrepo-kernel install kernel-ml kernel-ml-devel.x86_64
View the current kernel version
[root@localhost / root] # sudo awk-F\'$1mm = "menuentry" {print iTunes + ":" $2}'/ etc/grub2.cfg
0: CentOS Linux (5.5.0-1.el7.elrepo.x86_64) 7 (Core)
1: CentOS Linux (3.10.0-957.27.2.el7.x86_64) 7 (Core)
2: CentOS Linux (3.10.0-862.11.6.el7.x86_64) 7 (Core)
3: CentOS Linux (3.10.0-862.el7.x86_64) 7 (Core)
4: CentOS Linux (0-rescue-81b73827307a43799b9968e81edddb2f) 7 (Core)
Set 5.5.0 kernel as the default startup item
Grub2-set-default 0
Grub2-mkconfig-o / boot/grub2/grub.cfg
Restart the system
Reboot
Check again
[root@localhost / root] # uname-r
5.5.0-1.el7.elrepo.x86_64
[root@localhost / root] # uname-a
Linux localhost 5.5.0-1.el7.elrepo.x86_64 # 1 SMP Sun Jan 26 20:12:30 EST 2020 x86 "64 GNU/Linux
