建立yum源

本地yum源

• /usr/local/src/CentOS-7-x86_64-DVD-1810.iso

mkdir -p /mnt/cdrom
mount -o loop /usr/local/src/CentOS-7-x86_64-DVD-1810.iso /mnt/cdrom
cd /etc/yum.repos.d/
mkdir repo_bak
mv *.repo ./repo_bak
echo "[centos7]
name=centos7
baseurl=file:///mnt/cdrom
gpgcheck=0
enabled=1" >> centos7.repo
yum clean all
yum makecache

局域网yum源

• 先制作本地yum源
• 登录有yum源的服务器（假设IP为192.168.1.100）

yum install httpd
mkdir -p /var/www/html/yum
ln -s /mnt/cdrom/Packages /var/www/html/yum/
createrepo -g /mnt/cdrom/repodata/repomd.xml/ var/www/html/yum/

• 登录局域网设备配置repo文件

cd /etc/yum.repos.d/
mkdir repo_bak
mv *.repo ./repo_bak
echo "[centos7]
name=centos7
baseurl=http://192.168.1.100/yum/
gpgcheck=1
enabled=1" >> centos7.repo
yum clean all
yum makecache