How to do it...

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

1. Check the status of your Ceph installation:

      # ceph -s or # ceph status

1. Check Ceph's health detail:

      # ceph health detail

1.  Watch the cluster health:

      # ceph -w

1. Check Ceph's monitor quorum status:

      # ceph quorum_status --format json-pretty

1. Dump Ceph's monitor information:

      # ceph mon dump

1. Check the cluster usage status:

      # ceph df

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

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

1. List the placement group:

      # ceph pg dump

1.  List the Ceph pools in detail:

      # ceph osd pool ls detail

1.  Check the CRUSH map view of OSDs:

      # ceph osd tree

1. Check Ceph's OSD usage:

      # ceph osd df

1. 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.