Index a single Webpage
You can index an single Webpage (or an image or an pdf file on a webserver, including automatic text recognition by OCR, if enabled in the connector config /etc/opensemanticsearch/connector-web):
Start indexing by web interface
To start indexing a single web page via the web interface (i.e. http://localhost/search/admin/crawl):
Just write the url into the uri field and submit the form.
Command line tool
Or use or integrate (i.e. in a crontab or in your own scripts) this command line tool:
Using the REST-API:
Crawl whole websites or parts of a website
You can index a whole website with the web crawler module of Apache ManifoldCF.
With its Webinterface you can setup a homepage, a sitemap or a RSS-Feed as the start point and set how deep the crawl should be.
Its possible to setup rules which parts to crawl and which to exclude.
Another software for crawling a website is Scrapy.