8.3. Upgrading from RHEL 6.X to RHEL 7.X

Install migration tool
Install the tool to perform the migration from RHEL 6 to RHEL 7:
```
# yum install redhat-upgrade-tool
# yum install yum-utils
```
Disable all repositories
Disable all the enabled repositories:
```
# yum-config-manager --disable \*
```
Download latest RHEL 7 ISO
Visit the Software & Download Center in the Red Hat Customer Service Portal (https://access.redhat.com/downloads) to obtain the latest RHEL 7 ISO image file. Use a valid Red Hat Subscription to download the full installation files, obtain a free evaluation installation, or follow the links in this page to purchase a new Red Hat Subscription.
To download the RHEL 7 installation files using a Red Hat Subscription or a Red Hat Evaluation Subscription, perform the following steps:
1. Visit the Red Hat Customer Service Portal at https://access.redhat.com/login and enter your user name and password to log in.
2. Click Downloads to visit the Software & Download Center.
3. In the Red Hat Enterprise Linux area, click Download Software to download the latest version of the software.
Upgrade to RHEL 7 using ISO
Upgrade to RHEL 7 using the Red Hat upgrade tool and reboot after the upgrade process is completed:
```
# redhat-upgrade-tool --iso RHEL7_ISO_filepath --cleanup-post
# reboot
```
Important
The upgrade process is time-cosuming depending on your system's configuration and amount of data.