CENTOS 7移除旧版本内核

执行命令如下：

查看当前内核

[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-957.27.2.el7.x86_64 #1 SMP Mon Jul 29 17:46:05 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

查看所有内核

[root@localhost ~]# rpm -qa|grep kernel
kernel-3.10.0-957.27.2.el7.x86_64
kernel-devel-3.10.0-957.21.3.el7.x86_64
kernel-devel-3.10.0-957.27.2.el7.x86_64
abrt-addon-kerneloops-2.1.11-52.el7.centos.x86_64
kernel-3.10.0-957.21.3.el7.x86_64
kernel-3.10.0-862.el7.x86_64
kernel-tools-libs-3.10.0-957.21.3.el7.x86_64
kernel-headers-3.10.0-957.27.2.el7.x86_64
kernel-tools-3.10.0-957.21.3.el7.x86_64

移除不需要的内核

[root@localhost ~]# yum remove kernel-3.10.0-957.21.3.el7.x86_64 kernel-devel-3.10.0-957.21.3.el7.x86_64 kernel-tools-libs-3.10.0-957.21.3.el7.x86_64 kernel-tools-3.10.0-957.21.3.el7.x86_64 kernel-3.10.0-862.el7.x86_64
Loaded plugins: fastestmirror, langpacks
Resolving Dependencies
--> Running transaction check
---> Package kernel.x86_64 0:3.10.0-957.21.3.el7 will be erased
---> Package kernel.x86_64 0:3.10.0-862.el7 will be erased
---> Package kernel-devel.x86_64 0:3.10.0-957.21.3.el7 will be erased
---> Package kernel-tools.x86_64 0:3.10.0-957.21.3.el7 will be erased
---> Package kernel-tools-libs.x86_64 0:3.10.0-957.21.3.el7 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

===============================================================================================================================================================================================
 Package                                           Arch                                   Version                                              Repository                                 Size
===============================================================================================================================================================================================
Removing:
 kernel                                            x86_64                                 3.10.0-862.el7                                       @anaconda                                  62 M
 kernel-devel                                      x86_64                                 3.10.0-957.21.3.el7                                  @updates                                   37 M
 kernel-tools                                      x86_64                                 3.10.0-957.21.3.el7                                  @updates                                  288 k
 kernel-tools-libs                                 x86_64                                 3.10.0-957.21.3.el7                                  @updates                                   18 k

Transaction Summary
===============================================================================================================================================================================================
Remove  4 Packages

Installed size: 99 M
Is this ok [y/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Erasing    : kernel-tools-3.10.0-957.21.3.el7.x86_64                                                                                                                                     1/4 
  Erasing    : kernel-3.10.0-862.el7.x86_64                                                                                                                                                2/4 
  Erasing    : kernel-devel-3.10.0-957.21.3.el7.x86_64                                                                                                                                     3/4 
  Erasing    : kernel-tools-libs-3.10.0-957.21.3.el7.x86_64                                                                                                                                4/4 
  Verifying  : kernel-tools-libs-3.10.0-957.21.3.el7.x86_64                                                                                                                                1/4 
  Verifying  : kernel-tools-3.10.0-957.21.3.el7.x86_64                                                                                                                                     2/4 
  Verifying  : kernel-devel-3.10.0-957.21.3.el7.x86_64                                                                                                                                     3/4 
  Verifying  : kernel-3.10.0-862.el7.x86_64                                                                                                                                                4/4 

Removed:
  kernel.x86_64 0:3.10.0-862.el7        kernel-devel.x86_64 0:3.10.0-957.21.3.el7        kernel-tools.x86_64 0:3.10.0-957.21.3.el7        kernel-tools-libs.x86_64 0:3.10.0-957.21.3.el7       

Complete!

查看删除效果

[root@localhost ~]# rpm -qa|grep kernel
kernel-3.10.0-957.27.2.el7.x86_64
kernel-devel-3.10.0-957.27.2.el7.x86_64
abrt-addon-kerneloops-2.1.11-52.el7.centos.x86_64
kernel-headers-3.10.0-957.27.2.el7.x86_64