RHEL | Mounting ISO and Setting as Local Repo
This document provides a guide on mounting the RHEL ISO and setting it up as a local repo. This will enable RedHat Linux to install and update RPM packages.
This guide may work on another type of Linux as it is based on editing the repo file and mounting ISO media.
Prerequisite
- A Free RedHat Account
- Official Redhat Linux ISO
No Redhat license is required.
Step 1: Identify the Red Hat OS version
Run the following:
cat /etc/os-release
Look for the line VERSION="8.7 (Ootpa)" in the output. This will shows the version number.
[user@demo ~]$ cat /etc/os-release
NAME="Red Hat Enterprise Linux"
VERSION="8.7 (Ootpa)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="8.7"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Red Hat Enterprise Linux 8.7 (Ootpa)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:8::baseos"
HOME_URL="https://www.redhat.com/"
DOCUMENTATION_URL="https://access.redhat.com/documentation/red_hat_enterprise_linux/8/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"Step 2: Download the RHEL ISO of the correct version
If you do not have an account, you must register a free account before downloading. Download the RHEL ISO of your version from the official RHEL download website.
Step 3: Mount the ISO from your Hypervisor
From your Hyper-V manager, add the ISO to the DVD drive device of the Virtual Machine.
Step 4: Identify the DVD Drive inside Red Hat Linux
Run the following to identify the correct device name of the DVD drive: lsblk
Look for the label rom in the TYPE column. For below example, it is sr0. This means that the DVD drive is located at /dev/sr0. Take note of this device.
[user@demo ~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 2G 0 part /boot
└─sda2 8:2 0 97G 0 part
├─rhel-tmp 253:0 0 5G 0 lvm /tmp
├─rhel-var_log 253:1 0 20G 0 lvm /var/log
├─rhel-var 253:2 0 10G 0 lvm /var
├─rhel-swap 253:3 0 12G 0 lvm [SWAP]
├─rhel-home 253:4 0 10G 0 lvm /home
├─rhel-root 253:5 0 30G 0 lvm /
├─rhel-var_log_audit 253:6 0 5G 0 lvm /var/log/audit
└─rhel-var_tmp 253:7 0 5G 0 lvm /var/tmp
sdb 8:16 0 300G 0 disk
└─sdb1 8:17 0 300G 0 part /data
sr0 11:0 1 6.6G 0 romStep 5: Create a mountpoint and mount the DVD Drive locally
For this guide, the mountpoint used will be in /mnt/disc.
Run the following command. file /mnt/disc to create a mount point if it does not exist yet.
Output will show No such file or directory if it does not exist.
[user@demo ~]$ file /mnt/disc
/mnt/disc: cannot open `/mnt/disc' (No such file or directory)Create the mountpoint /mnt/disc directory with sudo mkdir /mnt/disc.
[user@demo ~]$ sudo mkdir /mnt/disc
[user@demo ~]$ file /mnt/disc
/mnt/disc: directoryNext, mount the DVD drive (/dev/sr0) to the mountpoint (/mnt/disc) with the command mount -o loop RHEL7.9.iso /mnt/disc.
[user@demo ~]$ sudo mount -o loop /dev/sr0 /mnt/discWith the DVD drive mounted, you can now list the content inside the disc with ls -al /mnt/disc.
[user@demo ~]$ ls -al /mnt/disc
total 53
dr-xr-xr-x. 7 root root 2048 Apr 4 2019 .
drwxr-xr-x. 3 root root 18 May 12 14:51 ..
dr-xr-xr-x. 4 root root 2048 Apr 4 2019 AppStream
dr-xr-xr-x. 4 root root 2048 Apr 4 2019 BaseOS
-r--r--r--. 1 root root 60 Apr 4 2019 .discinfo
dr-xr-xr-x. 3 root root 2048 Apr 4 2019 EFI
-r--r--r--. 1 root root 8266 Mar 1 2019 EULA
-r--r--r--. 1 root root 1455 Apr 4 2019 extra_files.json
-r--r--r--. 1 root root 18092 Mar 1 2019 GPL
dr-xr-xr-x. 3 root root 2048 Apr 4 2019 images
dr-xr-xr-x. 2 root root 2048 Apr 4 2019 isolinux
-r--r--r--. 1 root root 103 Apr 4 2019 media.repo
-r--r--r--. 1 root root 1669 Mar 1 2019 RPM-GPG-KEY-redhat-beta
-r--r--r--. 1 root root 5134 Mar 1 2019 RPM-GPG-KEY-redhat-release
-r--r--r--. 1 root root 1796 Apr 4 2019 TRANS.TBL
-r--r--r--. 1 root root 1566 Apr 4 2019 .treeinfoStep 6: Copying the media.repo file
Copy the media.repo file from the root of the mounted directory to /etc/yum.repos.d/ and set the permissions to 644.
[user@demo ~]$ sudo cp /mnt/disc/media.repo /etc/yum.repos.d/rhel8dvd.repo
[user@demo ~]$ sudo chmod 644 /etc/yum.repos.d/rhel8dvd.repoStep 7: Editing the rhel8dvd.repo
Edit the new repo file:
[user@demo ~]$ sudo vi /etc/yum.repos.d/rhel8dvd.repoCopy the following into the file:
[InstallMedia-BaseOS]
name=Red Hat Enterprise Linux DVD BaseOS
mediaid=None
metadata_expire=-1
gpgcheck=1
cost=500
enabled=1
baseurl=file:///mnt/disc/BaseOS
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[InstallMedia-AppStream]
name=Red Hat Enterprise Linux DVD AppStream
mediaid=None
metadata_expire=-1
gpgcheck=1
cost=500
enabled=1
baseurl=file:///mnt/disc/AppStream
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-releaseDisable any repo files that are not in use. Look for the line enabled = 1 and make sure that all are set to enabled = 0 in the other repo files.
[user@demo ~]$ cd /etc/yum.repos.d/
[user@demo yum.repos.d]$ sudo vi redhat.repoStep 8: Clear the yum cache
Clear the cache and check whether you can get the packages list from the DVD repo
[user@demo ~]$ sudo yum clean all
[user@demo ~]$ sudo yum repolist enabled
Updating Subscription Management repositories.
repo id repo name
InstallMedia-BaseOS Red Hat Enterprise Linux 8.7.0 BaseOS
InstallMedia-AppStream Red Hat Enterprise Linux 8.7.0 AppStreamNow, you can install any package with yum install <packagename> or update installed packages with yum update.
Disabling the Local Repo and Unmounting the DVD
This step should be completed before unmounting the DVD. To disable the local repo, delete the local repo file.
[user@demo ~]$ sudo rm rhel8dvd.repoUnmount the DVD Drive from the mountpoint
[user@demo ~]$ sudo umount /mnt/disc
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