Delete index with special characters :

%% : escape character for elasticsearch
{ : escape character for unix shell

curl -XDELETE 'localhost:9200/log_%%{typeindex}_2015.12.24?pretty'

" .... 'aaa' ..." : escape ' character

curl -XDELETE "localhost:9200/log_%%{fields['type']}_2015.12.24?pretty"

List all indexes :

curl 'localhost:9200/_cat/indices?v' | grep %