ElasticSearch indices

I checked the indices on a host that I have been given access too.
There are only 2 indices I want to continue to use.

Where did all these other indices come from, did ES install then as default clearly many dont have docs and are not used?

If ES doesn't need the extra indices< I will just delete them.

$ curl -XGET http://xx.xx.xx.xx:9200/_cat/indices?v
health status index                                                      pri rep docs.count docs.deleted store.size pri.store.size
green  open   getcfg.php                                                   1   0          0            0       144b           144b
green  open   pcidss                                                       1   0          0            0       144b           144b
green  open   wls-wsat                                                     1   0          0            0       144b           144b
green  open   ajax                                                         1   0          0            0       144b           144b
green  open   service                                                      1   0          5            0    111.9kb        111.9kb
green  open   integration                                                  1   0          0            0       144b           144b
green  open   backend                                                      1   0          1            0      2.5kb          2.5kb
green  open   user.action                                                  1   0          0            0       144b           144b
green  open   geoserver                                                    1   0          0            0       144b           144b
green  open   invoker                                                      1   0          0            0       144b           144b
green  open   password_change.cgi                                          1   0          0            0       144b           144b
green  open   spcgi.cgi                                                    1   0          0            0       144b           144b
green  open   struts2-rest-showcase                                        1   0          0            0       144b           144b
green  open   opennms                                                      1   0          0            0       144b           144b
green  open   rapi                                                         1   0          0            0       144b           144b
green  open   userportal                                                   1   0          0            0       144b           144b
green  open   spipe                                                        1   0          0            0       144b           144b
green  open   confluence                                        1   0          0            0       144b           144b
green  open   us-b8d6   1   0        200           36     41.1kb         41.1kb
green  open   default_sm_index_english                1   0       5577            0      4.8mb          4.8mb
green  open   console                                                      1   0          0            0       144b           144b
green  open   json                                                         1   0          0            0       144b           144b
green  open   apply.cgi                                                    1   0          0            0       144b           144b
green  open   node                                                         1   0          0            0       144b           144b
green  open   webconsole                                               1   0          0            0       144b           144b
green  open   goanywhere                                               1   0          0            0       144b           144b
green  open   api                                                          1   0         20            0     13.6kb         13.6kb
green  open   adminer                                                      1   0          0            0       144b           144b
green  open   app                                                          1   0          0            0       144b           144b
green  open   fileupload                                                   1   0          0            0       144b           144b
green  open   apps                                                         1   0          0            0       144b           144b
green  open   template                                                     1   0          0            0       144b           144b
green  open   server                                                       1   0          0            0       144b           144b
green  open   account                                                      1   0          0            0       144b           144b
green  open   pages                                                        1   0          0            0       144b           144b
green  open   orders                                                       1   0          0            0       144b           144b
green  open   wiki                                                         1   0          0            0       144b           144b
green  open   adminer.php                                           1   0          0            0       144b           144b
green  open   webtools                                                     1   0          0            0       144b           144b
green  open   us-b8d6d                                           1   0      18827           28      8.9mb          8.9mb
green  open   users                                                        1   0          0            0       144b           144b
green  open   clients                                                      1   0          0            0       144b           144b
green  open   session                                                      1   0          5            0     21.7kb         21.7kb
green  open   servlet                                                      1   0          0            0       144b           144b
green  open   templates                                                    1   0          0            0       144b           144b

Duplicate of ElasticSearch Node Rebuilt - lost indices

Please don't open multiple questions on the same topic. Thanks!