Nutch Tutorial

Follow these 10 steps to setup Nutch & crawl your site to create your own Web DB

In case of any queries drop me an email at mail.swapnilk@gmail.com

Have fun!!

Step 1:
Download latest binaries from here:
http://www.apache.org/dyn/closer.cgi/nutch/

Step 2:
Make required directories
sudo mkdir /usr/local/nutch
sudo mkdir /usr/local/nutch/framework
sudo mkdir /usr/local/nutch/dist

Step 3:
Copy to dist
sudo cp apache-nutch-1.4-bin.tar.gz /usr/local/nutch/dist/

Step 4:
Unpack
sudo tar -xvzf apache-nutch-1.4-bin.tar.gz -C /usr/local/nutch/framework/

Step 5:
Make executable
sudo chmod +x /usr/local/nutch/framework/apache-nutch-1.4-bin/runtime/local/bin/nutch

Step 6:
Make seed url file
sudo mkdir -p /usr/local/nutch/framework/apache-nutch-1.4-bin/runtime/local/bin/urls
sudo gedit /usr/local/nutch/framework/apache-nutch-1.4-bin/runtime/local/bin/urls/nutch

Add following to nutch.txt
http://www.usc.edu/

Step 7:
Add Agent
sudo gedit /usr/local/nutch/framework/apache-nutch-1.4-bin/runtime/local/conf/nutch-site.xml

Add this in Configuration
<property>
<name>http.agent.name</name>
<value>My Spider</value>
</property>

Step 8:
Edit regex
sudo gedit /usr/local/nutch/framework/apache-nutch-1.4-bin/runtime/local/conf/regex-urlfilter.txt

Replace

# accept anything else
+.

By this
# accept anything else
#+.

Then add
+^http://([a-z0-9]*\.)* www.usc.edu/

Step 9:
Setup JDK & set JAVA_HOME
sudo add-apt-repository ppa:ferramroberto/java
sudo apt-get update
sudo apt-get install sun-java6-jdk
sudo apt-get install sun-java6-jdk sun-java6-jre sun-java6-plugin sun-java6-fonts
export JAVA_HOME=/usr

Step 10:
Start Crawling!
/usr/local/nutch/framework/apache-nutch-1.4-bin/runtime/local/bin/nutch crawl urls -dir crawl -depth 10 -topN 1000