Provided by: ceph-common_0.41-1ubuntu2_amd64 bug


       ceph - ceph file system control utility


       ceph [ -m monaddr ] [ -w | command ... ]


       ceph  is  a  control  utility for communicating with the monitor cluster of a running Ceph
       distributed file system.

       There are three basic modes of operation.

   Interactive mode
       To start in interactive mode, no arguments are necessary. Control-d or 'quit' will exit.

   Watch mode
       To watch cluster state changes in real time,  starting  in  -w  (watch)  mode  will  print
       updates to stdout as they occur. For example, to keep an eye on cluster state, run:

       ceph -C ceph.conf -w

   Command line mode
       Finally,  to  send  a single instruction to the monitor cluster (and wait for a response),
       the command can be specified on the command line.


       -i infile
              will specify an input file to be passed along as a payload with the command to  the
              monitor cluster. This is only used for specific monitor commands.

       -o outfile
              will  write  any payload returned by the monitor cluster with its reply to outfile.
              Only specific monitor commands (e.g. osd getmap) return a payload.

       -c ceph.conf, --conf=ceph.conf
              Use ceph.conf configuration file instead  of  the  default  /etc/ceph/ceph.conf  to
              determine monitor addresses during startup.

       -m monaddress[:port]
              Connect to specified monitor (instead of looking through ceph.conf).


       To grab a copy of the current OSD map:

       ceph -m osd getmap -o osdmap

       To get a dump of placement group (PG) state:

       ceph pg dump -o pg.txt


       A  more complete summary of commands understood by the monitor cluster can be found in the
       wiki, at


       ceph is part of the Ceph distributed file  system.  Please  refer  to  the  Ceph  wiki  at for more information.


       ceph(8), mkcephfs(8)


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