centos升级系统内核及升级系统版本

查看版本

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)

查看内核版本

[root@localhost ~]# uname -r
3.10.0-862.el7.x86_64
[root@localhost ~]#

###准备升级内核到7.9系统的内核

 虚拟机新增一个cdrom，然后将iso镜像挂载上去

[root@localhost ~]# mount /dev/sr1 /mnt
mount: /dev/sr1 is write-protected, mounting read-only

[root@localhost ~]# ls /mnt
CentOS_BuildTag EULA images LiveOS repodata RPM-GPG-KEY-CentOS-Testing-7
EFI GPL isolinux Packages RPM-GPG-KEY-CentOS-7 TRANS.TBL

可以看出sr0是centos7.4的内核rpm软件包

[root@localhost Packages]# ls |grep 3.10 |grep -i kernel
kernel-3.10.0-862.el7.x86_64.rpm
kernel-abi-whitelists-3.10.0-862.el7.noarch.rpm
kernel-debug-devel-3.10.0-862.el7.x86_64.rpm
kernel-devel-3.10.0-862.el7.x86_64.rpm
kernel-headers-3.10.0-862.el7.x86_64.rpm
kernel-tools-3.10.0-862.el7.x86_64.rpm
kernel-tools-libs-3.10.0-862.el7.x86_64.rpm
[root@localhost Packages]# uname -r
3.10.0-862.el7.x86_64

[root@localhost Packages]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sr0 11:0 1 4.4G 0 rom
sr1 11:1 1 4.2G 0 rom /mnt
[root@localhost Packages]# mount /dev/sr0 /tmp
mount: /dev/sr0 is write-protected, mounting read-only
[root@localhost Packages]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 17G 1009M 17G 6% /
devtmpfs 476M 0 476M 0% /dev
tmpfs 488M 0 488M 0% /dev/shm
tmpfs 488M 7.6M 480M 2% /run
tmpfs 488M 0 488M 0% /sys/fs/cgroup
/dev/sda1 1014M 130M 885M 13% /boot
tmpfs 98M 0 98M 0% /run/user/0
/dev/sr1 4.2G 4.2G 0 100% /mnt
/dev/sr0 4.4G 4.4G 0 100% /tmp
[root@localhost Packages]# cd /tmp/Packages/
[root@localhost Packages]# ls |grep 3.10 |grep kernel
kernel-3.10.0-1160.el7.x86_64.rpm
kernel-abi-whitelists-3.10.0-1160.el7.noarch.rpm
kernel-debug-devel-3.10.0-1160.el7.x86_64.rpm
kernel-devel-3.10.0-1160.el7.x86_64.rpm
kernel-headers-3.10.0-1160.el7.x86_64.rpm
kernel-tools-3.10.0-1160.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.el7.x86_64.rpm

目标：内核升级成为”kernel-3.10.0-1160.el7.x86_64.rpm“