Comments on: How to Upgrade from RHEL 6 to RHEL 8 https://www.tecmint.com/upgrade-from-rhel-6-to-rhel-8/ Tecmint - Linux Howtos, Tutorials, Guides, News, Tips and Tricks. Mon, 21 Sep 2020 11:20:13 +0000 hourly 1 By: Goktug Ozturk https://www.tecmint.com/upgrade-from-rhel-6-to-rhel-8/comment-page-1/#comment-1366070 Mon, 21 Sep 2020 11:20:13 +0000 https://www.tecmint.com/?p=38748#comment-1366070 The subscription manager was not found on my Centos 6.

I needed to run the command below before the subscription-manager repos.

# wget -O /etc/yum.repos.d/epel-rhsm.repo http://repos.fedorapeople.org/repos/candlepin/subscription-manager/epel-subscription-manager.repo
# yum install subscription-manager -y

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