If you are experiencing issues with the yum command on a Red Hat Enterprise Linux (RHEL) system and the grouplist and groupinstall options are not working, there are several steps you can try to troubleshoot the problem:
Check the yum configuration files and make sure that the repository configuration is correct. You can check the repository configuration in the /etc/yum.repos.d directory.
Check the internet connection and make sure that the system can access the repositories. You can use the ping command to test the connectivity to the repositories.
Check the yum cache and make sure that it is up to date. You can use the yum clean all command to clean the yum cache and update the repository metadata.
Check the yum logs and make sure that there are no errors or issues with the yum command. You can check the yum logs in the /var/log/yum.log file.
If you are using a proxy server to access the repositories, make sure that the proxy configuration is correct. You can check the proxy configuration in the /etc/yum.conf file.
By following these steps and reviewing the documentation, you should be able to troubleshoot and fix any issues with the yum command and the grouplist and groupinstall options on your RHEL system.