Red Hat Knowledge Base

Reference Documents for Red Hat Products

• Red Hat Subscription Management Cheatsheet
• sosreport methods
  • Subscription Reference
• Troubleshooting
  • Failed to connect to bus: No medium found
• Repository \& Satellite
• Useful Links
• Appendix

Red Hat Subscription Management Cheatsheet

Refer SUBSCRIPTION-MANAGER COMMAND CHEAT SHEET

# subscribe
subscription-manager register

# subscribe using username and password in line and auto-attach pool
subscription-manager register --username <username> --password <password> --auto-attach

# Pull the latest subscription data from the server
subscription-manager refresh

# Set a role for your system.
subscription-manager role --set="Red Hat Enterprise Linux Server"

# List available subscriptions
subscription-manager list --available

# attach subscription automatically with availalbe pool
subscription-manager attach --auto

# Use the pool ID of the subscription to attach the pool to the system.
subscription-manager attach --pool=<subscription-pool-id>

# check consumed subscrptions
subscription-manager list --consumed

# Subscription details
subscription-manager identity
subscription-manager status

# listing repositories
subscription-manager repos --list

# enabling server repos
subscription-manager repos \
  --enable=rhel-7-server-rpms \
  --enable=rhel-server-rhscl-7-2.9.rpms

# or for RHEL8
subscription-manager repos \
  --enable=rhel-8-for-x86_64-baseos-rpms \
  --enable=rhel-8-for-x86_64-appstream-rpms

# enabling ansible repo
subscription-manager repos \
  --enable ansible-2-for-rhel-8-x86_64-rpms

# enabling AAP repo
subscription-manager repos \
  ansible-automation-platform-2.2-for-rhel-8-x86_64-rpms

# Unregistering a system
subscription-manager remove --all
subscription-manager unregister
subscription-manager clean

YUM Download only

yum install --downloadonly --downloaddir=<directory> <package>

sosreport methods

# Generate report to a specific path
sosreport -k docker.all=on -k docker.logs=on --tmp-dir /root/sos

• How to provide files to Red Hat Support (vmcore, rhev logcollector, sosreports, heap dumps, log files, etc.)

  Subscription Reference

• How to register and subscribe a system offline to the Red Hat Customer Portal
• How to register and subscribe a system to the Red Hat Customer Portal using Red Hat Subscription-Manager
• Common administrative commands in Red Hat Enterprise Linux 5, 6, 7, and 8 (Subscription Details, RHN ID, UUID)

Troubleshooting

Failed to connect to bus: No medium found

$ systemctl --user status automation-gateway
Failed to connect to bus: No medium found

The user account changed to user by su and sudo does not have the XDG* environment variables set, so rootless containers cannot be started as services via systemd.

Solution

$ export XDG_RUNTIME_DIR=/run/user/1008

Repository & Satellite

• How to create a local mirror of the latest update for Red Hat Enterprise Linux 5, 6, 7, 8 without using Satellite server?

• Creating a Local Repository and Sharing With Disconnected/Offline/Air-gapped Systems [Master Article]

• Yum Repository Configuration Helper

  This tool will help you set up a simple Yum repository for your local machine or a small number of other machines to use.

• How to create local repository distributed through apache of Red Hat Enterprise Linux 5/6/7/8 using DVD iso for update or installation?

• Configuring Virtual Machine Subscriptions in Red Hat Satellite- RED HAT SATELLITE 6.11 - Using virt-who to manage host-based subscriptions
• Simple Content Access

• Getting Started with Simple Content Access

• Does Red Hat Satellite 6 and Red Hat Satellite Capsule 6 support hardening?

Useful Links

• Red Hat on GitHub

Appendix

How to fix Repos not Visible on Client issue ?

goto https://access.redhat.com/labs/rhpc/

select the product -> version and arch -> follow scripted or manual

[svc-ansible@PL-PRD-ANS-PG-1 ~]$ systemctl –user status automation-gateway Failed to connect to bus: No medium found