@Denzil -
@Chetan_Tiwary_ is right on some of the basic troubleshooting. Always start with the date command to check date/time of the system.
You can set the date with
timedatectl set-ntp true
You can clean up existing subscription manager pieces with:
subscription-manager clean
subscription-manager register
Also based on your message above, it appears at one time the system was subscribed to EPEL. This generally isn't good to leave it subscribed there as EPEL has some of the same packages as RHEL and sometimes with updates you can replaced Red Hat packages with some on EPEL and that is where RPM and version conflicts can begin and it looks like you might be having an issue with that too.
The repos you are registered to are in /etc/yum.repos.d/*.repo where *.repo could be any of the repo files. You can look at all of those to see which ones are enabled. I would advise until getting the system fixed and updated you have only RHEL channels and possibly removing packages that are causing conflicts by doing dnf erase PKG_NAME or yum erase PKG_NAME since you are still RHEL8.
subscription-manager repos --enable/disable will enable or disable repositories.
I also strongly suggest taking a look at some basic RHEL System administration courses at this point because you should really get a handle on things before going too much further as a question at a time like this will result in fragmented learning and an incomplete or possibly an incorrect picture of how to manage and run the systems.
This forum is great for when you get stuck on things or can't remember or need to know something new, but for complete learning it may make things harder for you as you are learning things totally out of order and you are doing it on a system that has clearly been running and isn't just straight RHEL as you have EPEL and other things installed (which is fine, but not common from the start).
At this point it would be the equivalent of someone learning to drive ... you've had the basic idea, maybe played Mario Kart, been a passenger in some nice vehicles and someone hands you the keys to a $150,000 car and you are asking how to unlock it first (maybe it has strange locks) but then maybe how to shift gears ... again might be a standard or some strange gearshift. Then you find the same kind of car already running, you get in, start driving and find out it is different and you didnt' ask how to steer or how to stop.
I would suggest starting with some course or a book or something, installing and playing around with Linux or using a live distro like I have mentioned before to become comfortable with the basic setup or maybe even reinstalling your RHEL system. There is currently no amount of questions and information you can provide that would be enough information to give you a complete learning experience that would allow you to properly connect all the dots, so you will have these fragments of pieces that might not go together or make sense. It is one thing to try and get that system back up and running where things are stuck and broken, but if you are using it to "learn" the basics, we are too far in because a RHEL system out of the box wouldn't be subscribed to EPEL or have other packages already installed.
Problem: conflicting requests
- nothing provides qrencode needed by pass-1.7.4-16.el8.noarch from epel
One other way of knowing what all channels your system thinks it is subscribed to is to do a
yum repolist
This will list all channels where packages can be downloaded and installed
Travis Michette, RHCA XIII
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SENIOR TECHNICAL INSTRUCTOR / CERTIFIED INSTRUCTOR AND EXAMINER
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