Today I started to work on a little project that required a crawler, and Nutch seemed to do most of what I needed. The nutch team conveniently released Nutch 1.0 late in March 2009, so I had a brand new release to test out. Installing nutch 1.0 on a mac is not as straight forward as I thought, I ran into a lot of unexpected issues and here is my cook book description of how to successfully install nutch 1.0 on your mac. Download the latest source code from the Apache SVN...

 This howto will explain how to get Nutch, Nutch-Gui, Sun JDK & Tomcat 6.0.16 working on Centos 5.x while maintaining a normally functioning Centos system. Currently, Centos 5.x ships with Tomcat 5.5, however, while it does run, there are problems with the default install of this version that results in errors which are undocumented and persistent at this time. If you have information or believe that these errors have been addressed and can point to a fix, please use the...

 Requirements Java 1.4.x, either from Sun or IBM on Linux is preferred. Set NUTCH_JAVA_HOME to the root of your JVM installation. Apache's Tomcat 4.x. On Win32, cygwin, for shell support. (If you plan to use Subversion on Win32, be sure to select the subversion package when you install, in the "Devel" category.) Up to a gigabyte of free disk space, a high-speed connection, and an hour or so.

Getting Started

First, you need to get a copy of the Nutch code. You can...

 This document contains instructions for downloading and installing Nutch and Lucene. Please beware that you must be logged into the csci571 computer to run Apache tomcat and not on aludra or nunki. Downloading and Installing Nutch Downloading and Installing Lucene

Downloading and Installing Nutch
Chris A. Mattmann
This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Pre-requisites

Installation of Java 1.4 or above. You can download java from http://java.sun.com
Installation of Apache ANT 1.6...

 How do I create traffic graphs?

Before you can create traffic graphs, Cacti must have working SNMP support. One way to do this is to compile PHP with SNMP support built in, many times you can install the 'php-snmp' package to do this. The second option is to have Cacti call the snmpget and snmpwalk binaries from your ucd-snmp or net-snmpinstallation. You can use the about page to determine whether to are using "built-in" or "external" SNMP support.

Now that you have working SNMP support...

 Configuration steps

=> First enable packet forwarding
=> Next setup Network Address Translation using IPTABLES MASQUERADE targets
=> Save the changes
=> Verify everything is working

I'm assuming that your setup is as follows:
A) You are using any Linux distro

B) eth0 is internet interface (connected to router for example) and eth1 connected to your internal lan (connected to your HUB/Switch for example).

My Linux eth0 --> Internetbox eth1 --> Lan

Step # 1 Turn on ip...

 Debian based systems use the file /etc/hostname to read the hostname of the system at boot time and set it up using the init script /etc/init.d/hostname.sh
#cat /etc/hostname
debianadmin
So on a Debian based system we can edit the file /etc/hostname and change the name of the system and then run
/etc/init.d/hostname.sh startto make the change active. The hostname saved in this file (/etc/hostname) will be preserved on system reboot (and will be set using the same script we used...