How to yum install packages from ISO file without internet. (CentOS)

1. If you have the ISO burnt into a DVD, insert the DVD into the CentOS system. If the ISO is not burnt into a DVD, but present as a separate file on the file system, then skip the next two steps and go directly to step 4 in this list.
2. Check if the DVD has been mounted automatically. To do this execute the following command:

   mount | grep CentOS
   

   If this command returns an output, it means the DVD has been mounted. For example, the following example output shows that the DVD has been mounted to /media/CentOS_6.4_Finalautomatically.

   /dev/sr0 on /media/CentOS_6.4_Final type iso9660 (ro,nosuid,nodev,uhelper=udisks,uid=500,gid=500,iocharset=utf8,mode=0400,dmode=0500)
   

3. If the CD has been mounted automatically, then ignore this step. Otherwise, mount it manually.

   mkdir /media/CentOS
   mount -t iso9660 /dev/sr0 /media/CentOS
   

4. If the ISO is present on the file system, mount it to /media/CentOS using the mount command with -o loop option.

   mount -o loop CentOS-6.4-x86_64-bin-DVD1.iso /media/CentOS/
   

5. Execute: cat /etc/yum.repos.d/CentOS-Media.repo and read the information provided as comments in this file. See the repo name within square brackets. It is c6-media by default. Also, see the locations specified for baseurl property. These URLs point to local directories /media/CentOS, /media/cdrom and /media/cdrecorder/ by default.
6. If the DVD is mounted to a mount point specified in the baseurl property, then ignore this step. Otherwise, create a symbolic link at a location specified in the baseurl property with the mount point as its target. An example follows.

   ln -s /media/CentOS_6.4_Final /media/CentOS
   

7. In the shell, execute the yum command while disabling all repos except the repo specified in /etc/yum.repos.d/CentOS-Media.repo:

   yum --disablerepo=\* --enablerepo=c6-media install gcc