Yum repository Pre-requesists for creating a repo

PreConfiguration  for yum Repositories.

first of all you need to install following 3 RPMS.

createrepo
deltarpm
pythondelta

rpm -ivh createrepo    deltarpm      pythondelta

then go to   /etc/yum.repos.d  folder and  back up all existing repositories (.repo files).

Then go to rpm copied location  and create repositories.
OS > cd  /mnt/Packages 

OS >createrepo  .

create the repository file
ex : linux.repo

-------------------------------------<<file open>>---------------------------------
[linux]
baseUrl= file:///mnt/Packages

eabled=1
gpgcheck=no

-------------------------------<<file close>>----------------------------

check where created list is available

 yum list

install using yum repository

yum makecache

Download and make usable all the metadata for the currently enabled yum rep


yum install  gcc

Installing from the file

yum install -y `cat /tmp/test`