centos8

yum Configuration

I only recommend using the network-based yum.

• Network source: Alibaba yum centos8

  wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

  centos7

  wget -O /etc/yum.repo.d/CentOS-Linux-BaseOS.repo http://mirrors.aliyun.com/repo/Centos-8.repo

  etc.
• Local yum mounting: it’s slow, not recommended.

1. Step one:
   • Check whether the DVD drive is connected; you can use lsblk df to view it.
2. Step two:
   • Create a mount point with mkdir /mnt/a, then mount it using mount /dev/cdrom /mnt/a
   • Use df -hT /mnt/a to view the mount record.
3. Step three:
   • Use cd /etc/yum.repo.d/ to go to the yum configuration directory.
   • mkdir /aa
   • Back up by running mv *.repo aa
   • Copy out a yum.base.repo using cp -p . (the dot here means the current directory)
4. Step four:
   • vim /etc/yum.Base.repo
   • Change the directory to the mount point you created.
   • Press wq to save.

Too much hassle — just use a network source instead.