Redhat 7 - create new REPO from ISO

1) su -

2) cd /
3) mkdir /cdrom
4) mount /dev/sr0 /cdrom
=> mkae sure the RHEL 7.5 iso is in cdrom 0

5) cd /etc/yum.repos.d/
6) mv redhat.repo redhat.repo_bk
7) vi dvd.repo

[dvd-source]

name=RHEL 7.5

baseurl=file://cdrom

enabled=1

gpgcheck=0

8) yum repolist
=> should see the RHEL 7.5 now