【Linux】Centos8删除多余内核版本_centos kernel、kernel-headers、kernel-devel卸载

背景

Centos8系统中有两个内核版本，一个是5.4.172，另一个是4.18.0如下图：

比如需要删除多余的5.4.172内核。

删除步骤

-1，查看当前系统的内核版本号
使用命令：uname -r
如下：

[jn@localhost ~]$ uname -r
4.18.0-348.7.1.el8_5.x86_64
[jn@localhost ~]$
1
2
3

-2，查找点前系统上存在的内核
使用命令：rpm -qa | grep kernel
如下：

[jn@localhost ~]$ rpm -qa | grep kernel
kernel-headers-4.18.0-348.7.1.el8_5.x86_64
kernel-4.18.0-348.7.1.el8_5.x86_64
kernel-tools-libs-4.18.0-348.7.1.el8_5.x86_64
kernel-lt-5.4.172-1.el8.elrepo.x86_64
kernel-core-4.18.0-193.el8.x86_64
kernel-lt-core-5.4.172-1.el8.elrepo.x86_64
kernel-tools-4.18.0-348.7.1.el8_5.x86_64
kernel-4.18.0-193.el8.x86_64
kernel-lt-devel-5.4.172-1.el8.elrepo.x86_64
kernel-modules-4.18.0-348.7.1.el8_5.x86_64
kernel-devel-4.18.0-348.7.1.el8_5.x86_64
kernel-core-4.18.0-348.7.1.el8_5.x86_64
kernel-lt-modules-5.4.172-1.el8.elrepo.x86_64
kernel-modules-4.18.0-193.el8.x86_64
[jn@localhost ~]$
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

-3，移除多余的内核版本
使用命令：yum remove kernel-XXXXXXXXX

如下：

[jn@localhost ~]$ sudo yum remove kernel-lt-5.4.172-1.el8.elrepo.x86_64
[sudo] jn 的密码：
依赖关系解决。
=====================================================================
软件包    架构    版本    仓库    大小
=====================================================================
移除:
kernel-lt     x86_64    5.4.172-1.el8.elrepo    @elrepo-kernel    0  
清除未被使用的依赖关系:
kernel-lt-core    x86_64    5.4.172-1.el8.elrepo    @elrepo-kernel    63 M
kernel-lt-modules    x86_64    5.4.172-1.el8.elrepo    @elrepo-kernel    24 M

事务概要
====================================================================
移除  3 软件包

将会释放空间：87 M
确定吗？[y/N]： y
运行事务检查
事务检查成功。
运行事务测试
事务测试成功。
运行事务
  准备中  :                                                                                                                    1/1
  删除    : kernel-lt-5.4.172-1.el8.elrepo.x86_64                                                                              1/3
  删除    : kernel-lt-modules-5.4.172-1.el8.elrepo.x86_64                                                                      2/3
  运行脚本: kernel-lt-modules-5.4.172-1.el8.elrepo.x86_64                                                                      2/3
  运行脚本: kernel-lt-core-5.4.172-1.el8.elrepo.x86_64                                                                         3/3
dkms: removing: nvidia 470.94 (5.4.172-1.el8.elrepo.x86_64) (x86_64)
Module nvidia-470.94 for kernel 5.4.172-1.el8.elrepo.x86_64 (x86_64).
Before uninstall, this module version was ACTIVE on this kernel.
Removing any linked weak-modules
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/rtc/rtc-hid-sensor-time.ko.xz needs unknown symbol hid_sensor_parse_common_attributes
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/hwmon/iio_hwmon.ko.xz needs unknown symbol iio_get_channel_type
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/hwmon/iio_hwmon.ko.xz needs unknown symbol devm_iio_channel_get_all
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/hwmon/iio_hwmon.ko.xz needs unknown symbol iio_read_channel_processed
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_create_server
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_l2t_get
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_pktgl_to_skb
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_port_idx
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_best_aligned_mtu
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_register_uld
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_remove_server
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_l2t_send
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_port_viid
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_alloc_stid
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_ofld_send
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_remove_tid
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_port_chan
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_immdata_send
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_unregister_uld
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_free_stid
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/crypto/chelsio/chtls/chtls.ko.xz needs unknown symbol cxgb4_l2t_release
depmod: WARNING: /lib/modules/5.4.172-1.el8.elrepo.x86_64/kernel/drivers/hid/hid-asus.ko.xz needs unknown symbol asus_wmi_evaluate_method

nvidia.ko.xz:
- Uninstallation
   - Deleting from: /lib/modules/5.4.172-1.el8.elrepo.x86_64/extra/
- Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-uvm.ko.xz:
- Uninstallation
   - Deleting from: /lib/modules/5.4.172-1.el8.elrepo.x86_64/extra/
- Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-modeset.ko.xz:
- Uninstallation
   - Deleting from: /lib/modules/5.4.172-1.el8.elrepo.x86_64/extra/
- Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-drm.ko.xz:
- Uninstallation
   - Deleting from: /lib/modules/5.4.172-1.el8.elrepo.x86_64/extra/
- Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-peermem.ko.xz:
- Uninstallation
   - Deleting from: /lib/modules/5.4.172-1.el8.elrepo.x86_64/extra/
- Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.
depmod...

  删除    : kernel-lt-core-5.4.172-1.el8.elrepo.x86_64                                                                         3/3
警告：文件 /lib/modules/5.4.172-1.el8.elrepo.x86_64/updates：移除失败：没有那个文件或目录


  运行脚本: kernel-lt-core-5.4.172-1.el8.elrepo.x86_64                                                                         3/3
  验证    : kernel-lt-5.4.172-1.el8.elrepo.x86_64                                                                              1/3
  验证    : kernel-lt-core-5.4.172-1.el8.elrepo.x86_64                                                                         2/3
  验证    : kernel-lt-modules-5.4.172-1.el8.elrepo.x86_64                                                                      3/3
已更新安装的产品。

已移除:
  kernel-lt-5.4.172-1.el8.elrepo.x86_64  kernel-lt-core-5.4.172-1.el8.elrepo.x86_64  kernel-lt-modules-5.4.172-1.el8.elrepo.x86_64

完毕！
[hl@localhost ~]$ rpm -qa | grep kernel
kernel-headers-4.18.0-348.7.1.el8_5.x86_64
kernel-4.18.0-348.7.1.el8_5.x86_64
kernel-tools-libs-4.18.0-348.7.1.el8_5.x86_64
kernel-core-4.18.0-193.el8.x86_64
kernel-tools-4.18.0-348.7.1.el8_5.x86_64
kernel-4.18.0-193.el8.x86_64
kernel-lt-devel-5.4.172-1.el8.elrepo.x86_64
kernel-modules-4.18.0-348.7.1.el8_5.x86_64
kernel-devel-4.18.0-348.7.1.el8_5.x86_64
kernel-core-4.18.0-348.7.1.el8_5.x86_64
kernel-modules-4.18.0-193.el8.x86_64
[hl@localhost ~]$ sudo yum remove kernel-lt-devel-5.4.172-1.el8.elrepo.x86_64
依赖关系解决。
=============================================================================
软件包    架构    版本    仓库    大小
=============================================================================
移除:
kernel-lt-devel    x86_64    5.4.172-1.el8.elrepo    @elrepo-kernel    49 M


事务概要
=============================================================================
移除  1 软件包

将会释放空间：49 M
确定吗？[y/N]： y
运行事务检查
事务检查成功。
运行事务测试
事务测试成功。
运行事务
  准备中  :                                                                                                                    1/1
  删除    : kernel-lt-devel-5.4.172-1.el8.elrepo.x86_64                                                                        1/1
  验证    : kernel-lt-devel-5.4.172-1.el8.elrepo.x86_64                                                                        1/1
已更新安装的产品。

已移除:
  kernel-lt-devel-5.4.172-1.el8.elrepo.x86_64                                                                                      
完毕！
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

查询否把5.4.172内核删掉：

[jn@localhost ~]$ rpm -qa | grep kernel
kernel-headers-4.18.0-348.7.1.el8_5.x86_64
kernel-4.18.0-348.7.1.el8_5.x86_64
kernel-tools-libs-4.18.0-348.7.1.el8_5.x86_64
kernel-core-4.18.0-193.el8.x86_64
kernel-tools-4.18.0-348.7.1.el8_5.x86_64
kernel-4.18.0-193.el8.x86_64
kernel-modules-4.18.0-348.7.1.el8_5.x86_64
kernel-devel-4.18.0-348.7.1.el8_5.x86_64
kernel-core-4.18.0-348.7.1.el8_5.x86_64
kernel-modules-4.18.0-193.el8.x86_64
[jn@localhost ~]$
1
2
3
4
5
6
7
8
9
10
11
12

如上已经删掉5.4.172内核！

-4，重启
采用如下命令重启：

$ sudo reboot
1

重启之后5.4.172内核版已经消失，如下图：

注意：不需要再修改grub.conf文件!