1. 挂载iso文件

首先要把redhat iso文件上传至系统中 ;
image.png

临时挂载

创建挂载目录并挂载iso文件

  1. mkdir /mnt
  2. mount -o loop -t iso9660 /root/rhel-8.2-X86_64-dvd.iso /mnt
  1. 挂载成功可，可通过df -hl查看挂载情况
  1. root@rhel8 ~]# df -hl | grep -v tmpfs
  2. Filesystem      Size  Used Avail Use% Mounted on
  3. /dev/nvme0n1p1   20G   13G  7.8G  62% /
  4. /dev/loop0      7.9G  7.9G     0 100% /mnt

永久挂载

  1. [root@rhel8 ~]# vim /etc/fstab
  3. UUID=1ddeda22-dae5-4422-a083-8f6e206cb163 /                       xfs     defaults        0 0
  4. UUID=a86a861e-e1bb-4aed-a0e2-544431a0ecb4 swap                    swap    defaults        0 0
  5. /root/rhel-8.2-x86_64-dvd.iso            /mnt                     iso9660 defaults        0 0

2. 更新yum源文件

  1. [root@rhel8 ~]# vim /etc/yum.repos.d/redhat8.repo 
  3. [appstream]
  4. name=redhat8
  5. baseurl=file:///mnt/AppStream
  6. enabled=1
  7. gpgcheck=0
  10. [baseos]
  11. name=baseos
  12. baseurl=file:///mnt/BaseOS
  13. enabled=1
  14. gpgcheck=0

若Redhat为7.0或者以前，需留意baseurl的路径为file:///mnt/. 我自己个人觉得是因为Redhat8.0这边版本较之前的版本多了AppStream和BaseOS的文件夹.
image.png
更新完毕后，保存退出；
清除yum缓存

  1. [root@rhel8 ~]# yum clean all
  2. Updating Subscription Management repositories.
  3. Unable to read consumer identity
  4. This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
  5. 12 files removed
  6. [root@rhel8 ~]#
  1.  更新yum缓存
  1. [root@rhel8 ~]# yum makecache 
  2. Updating Subscription Management repositories.
  3. Unable to read consumer identity
  4. This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
  5. redhat8                                          87 MB/s | 5.8 MB     00:00    
  6. baseos                                                              116 MB/s | 2.3 MB     00:00    
  7. Last metadata expiration check: 0:00:01 ago on Sun 20 Mar 2022 12:06:12 PM CST.
  8. Metadata cache created.
  9. [root@rhel8 ~]#

3. 检验yum更新源可用性

  1. [root@rhel8 ~]# yum list