这里介绍一下，平常使用频率较高的一些命令
1. 查看集群健康情况
http://localhost:9200/_cat
=^.^=
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/tasks
/_cat/indices
/_cat/indices/{index}
/_cat/segments
/_cat/segments/{index}
/_cat/count
/_cat/count/{index}
/_cat/recovery
/_cat/recovery/{index}
/_cat/health
/_cat/pending_tasks
/_cat/aliases
/_cat/aliases/{alias}
/_cat/thread_pool
/_cat/thread_pool/{thread_pools}
/_cat/plugins
/_cat/fielddata
/_cat/fielddata/{fields}
/_cat/nodeattrs
/_cat/repositories
/_cat/snapshots/{repository}
/_cat/templates
http://localhost:9200/_cat/health?v epoch timestamp cluster status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent 1586056370 03:12:50 main-search green 9 7 50 25 0 0 0 0 - 100.0%
说明：v是用来要求在结果中返回表头
状态值说明
Green - everything is good (cluster is fully functional)，即最佳状态
Yellow - all data is available but some replicas are not yet allocated (cluster is fully functional)，即数据和集群可用，但是集群的备份有的是坏的
Red - some data is not available for whatever reason (cluster is partially functional)，即数据和集群都不可用
2. 查看所有节点
/_cat/nodes
3. 查看所有索引
http://localhost:9200/_cat/indices?v green open .monitoring-kibana-7-2020.04.01 601ZG1FRQY688qAp3O1uaQ 1 1 8640 0 5.3mb 2.6mb green open .monitoring-kibana-7-2020.04.02 J89ViHaQQC697nQ5gqMXtg 1 1 8639 0 5.3mb 2.6mb green open .monitoring-kibana-7-2020.04.03 C-Sp-DDpTmWMZzdk1E3Wbw 1 1 3242 0 2.1mb 1mb green open .monitoring-es-7-2020.04.05 3NT3phueS-qf76XDtwYKcw 1 1 34632 59482 60.6mb 31mb
4.
原文：https://www.cnblogs.com/xingxia/p/Elasticsearch_usage.html