Lucene Core&160; is an open-source search software, provides Java-based indexing and search technology, as well as spellchecking, hit highlighting and advanced analysis/tokenization capabilities. Luke is a handy development and diagnostic tool, which accesses already existing Lucene indexes and allows you to display and modify their content.
Luke is awesome, but often times it is not feasible to inspect an index on a remote machine using a GUI. That's where Clue comes in. You can SSH into your production box and inspect your index using your favorite shell
Another important feature for Clue is the ability to interact with other Unix commands via piping, e.g. grep, more etc.
./bin/clue.sh my-idx command args
./bin/clue.sh my-idx help
using configuration file found at: /Users/johnwang/github/clue/config/clue.conf Analyzer: class org.apache.lucene.analysis.standard.StandardAnalyzer Query Builder: class com.senseidb.clue.api.DefaultQueryBuilder Directory Builder: class com.senseidb.clue.api.DefaultDirectoryBuilder IndexReader Factory: class com.senseidb.clue.api.DefaultIndexReaderFactory delete - deletes a list of documents from searching via a query, input: query directory - prints directory information docval - gets doc value for a given doc, <field> <docid>, if <docid> not specified, all docs are shown exit - exits program explain - shows score explanation of a doc export - export index to readable text files help - displays help info - displays information about the index, <segment number> to get information on the segment merge - force merges segments into given N segments, input: number of max segments norm - displays norm values for a field for a list of documents postings - iterating postings given a term, e.g. <fieldname:fieldvalue> readonly - puts clue in readonly mode reconstruct - reconstructs an indexed field for a document search - executes a query against the index, input: <query string> stored - displays stored data for a given field terms - gets terms from the index, <field:term>, term can be a prefix trim - trims the index, <TRIM PERCENTAGE> <OPTIONS>, options are: head, tail, random tv - shows term vector of a field for a doc
See https://github.com/javasoze/clue for more details
Thanks javasoze for this wonderful tool, it is now part of my standard toolbox.