Now that we have a running Ceph cluster, we will perform some hands-on practice to gain experience with Ceph using some basic commands.

Below are some of the common commands used by Ceph admins:

1. Check the status of your Ceph installation:

      # ceph -s or # ceph status

2. Check Ceph's health detail:

      # ceph health detail

3. Watch the cluster health:

      # ceph -w

4. Check Ceph's monitor quorum status:

      # ceph quorum_status --format json-pretty

5. Dump Ceph's monitor information:

      # ceph mon dump

6. Check the cluster usage status:

      # ceph df

7. Check the Ceph monitor, OSD, pool, and placement group stats:

      # ceph mon stat
      # ceph osd stat
      # ceph osd pool stats
      # ceph pg stat

8. List the placement group:

      # ceph pg dump

9. List the Ceph pools in detail:

      # ceph osd pool ls detail

10. Check the CRUSH map view of OSDs:

      # ceph osd tree

11. Check Ceph's OSD usage:

      # ceph osd df

12. List the cluster authentication keys:

      # ceph auth list

These were some basic commands that you learned in this section. In the upcoming chapters, you will learn advanced commands for Ceph cluster management.