# dnf install -y dnf-utils createrepo

The reposync command is used to synchronize a remote yum repository to a local directory, using yum to retrieve the packages.

# mkdir -p /software/redhat/8/base
# /usr/bin/reposync --newest-only --repoid=rh8_baseos_latest -p /software/redhat/8/base
# /usr/bin/createrepo /software/redhat/8/base

script example

#!/bin/bash

logpath=/var/log
logname=$logpath/repo_sync_$(date +%Y.%m.%d).log

# Remove old logs
find $logpath/repo_sync* -mtime +5 -delete; >> $logname 2>&1

# Sync repositories
/usr/bin/reposync --newest-only --repoid=rh8_baseos_latest -/software/redhat/8/base >> $logname 2>&1

/usr/bin/createrepo /software/redhat/8/base/getPackage/ >> $logname 2>&1

# reposync –gpgcheck -l –repoid=rhel-6-server-rpms –download_path=/var/www/html

Using a proxy with Yum

# vi /etc/yum.conf
proxy=http://someproxyserver.com:8000
proxy_username=proxyuser
proxy_password=proxypass
...