gistfile1.txt

➜  ~ yarn
Usage: yarn [--config confdir] [COMMAND | CLASSNAME]
  CLASSNAME                             run the class named CLASSNAME
 or
  where COMMAND is one of:
  resourcemanager -format-state-store   deletes the RMStateStore
  resourcemanager                       run the ResourceManager
  nodemanager                           run a nodemanager on each slave
  timelineserver                        run the timeline server
  rmadmin                               admin tools
  sharedcachemanager                    run the SharedCacheManager daemon
  scmadmin                              SharedCacheManager admin tools
  version                               print the version
  jar <jar>                             run a jar file
  application                           prints application(s)
                                        report/kill application
  applicationattempt                    prints applicationattempt(s)
                                        report
  container                             prints container(s) report
  node                                  prints node report(s)
  queue                                 prints queue information
  logs                                  dump container logs
  classpath                             prints the class path needed to
                                        get the Hadoop jar and the
                                        required libraries
  cluster                               prints cluster information
  daemonlog                             get/set the log level for each
                                        daemon

Most commands print help when invoked w/o parameters.