# Uses of Class
org.apache.nutch.util.NutchTool

Packages that use NutchTool
Package
Description
org.apache.nutch.crawl
Crawl control code and tools to run the crawler.
org.apache.nutch.fetcher
The Nutch multi-threaded fetching module
org.apache.nutch.indexer
Index content, configure and run indexing and cleaning jobs to add, update, and delete documents from an index.
org.apache.nutch.parse
The `Parse` interface and related classes.
org.apache.nutch.tools
Miscellaneous tools.

- ## Uses of NutchTool in org.apache.nutch.crawl

  Subclasses of NutchTool in org.apache.nutch.crawl
  Modifier and Type
  Class
  Description
  `class`
  `CrawlDb`
  This class takes the output of the fetcher and updates the crawldb accordingly.
  `class`
  `DeduplicationJob`
  Generic deduplicator which groups fetched URLs with the same digest and marks all of them as duplicate except the one with the highest score (based on the score in the crawldb, which is not necessarily the same as the score indexed).
  `class`
  `Generator`
  Generates a subset of a CrawlDb to fetch.
  `class`
  `Injector`
  Injector takes a flat text file of URLs (or a folder containing text files) and merges ("injects") these URLs into the CrawlDb.
  `class`
  `LinkDb`
  Maintains an inverted link map, listing incoming links for each url.

- ## Uses of NutchTool in org.apache.nutch.fetcher

  Subclasses of NutchTool in org.apache.nutch.fetcher
  Modifier and Type
  Class
  Description
  `class`
  `Fetcher`
  A queue-based fetcher.

- ## Uses of NutchTool in org.apache.nutch.indexer

  Subclasses of NutchTool in org.apache.nutch.indexer
  Modifier and Type
  Class
  Description
  `class`
  `IndexingJob`
  Generic indexer which relies on the plugins implementing IndexWriter

- ## Uses of NutchTool in org.apache.nutch.parse

  Subclasses of NutchTool in org.apache.nutch.parse
  Modifier and Type
  Class
  Description
  `class`
  `ParseSegment`

- ## Uses of NutchTool in org.apache.nutch.tools

  Subclasses of NutchTool in org.apache.nutch.tools
  Modifier and Type
  Class
  Description
  `class`
  `CommonCrawlDataDumper`
  The Common Crawl Data Dumper tool enables one to reverse generate the raw content from Nutch segment data directories into a common crawling data format, consumed by many applications.