Printing the "solr" command line help:

$ ${SOLR_ROOT}/bin/solr -help

Usage: solr COMMAND OPTIONS

where COMMAND is one of:
  start
  stop
  restart
  status
  healthcheck
  create
  create_core
  create_collection
  delete
  version
  zk
  auth
  assert
  config
  export
  api
  package

Pass -help after any COMMAND to see the command-specific usage information (OPTIONS)

Start Solr:

$ ${SOLR_ROOT}/bin/solr start

Restart Solr:

$ ${SOLR_ROOT}/bin/solr restart

Stop Solr:

$ ${SOLR_ROOT}/bin/solr stop

Solr Version:

$ ${SOLR_ROOT}/bin/solr version

Solr Status:

$ ${SOLR_ROOT}/bin/solr status

Solr Healthcheck:

$ ${SOLR_ROOT}/bin/solr healthcheck

Create collections (if Solr is running in SolrCloud):

$ ${SOLR_ROOT}/bin/solr create

Create collections:

$ ${SOLR_ROOT}/bin/solr create_collection

Delete collections (if Solr is running in SolrCloud):

$ ${SOLR_ROOT}/bin/solr delete

Handling data in ZooKeeper:

$ ${SOLR_ROOT}/bin/solr zk COMMAND