YaCy – Peer to Peer free software search engine

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YaCy is a free search engine that anyone can use to build a search portal for their intranet or to help search the public internet. When contributing to the world-wide peer network, the scale of YaCy is limited only by the number of users in the world and can index billions of web pages. It is fully decentralized, all users of the search engine network are equal, the network does not store user search requests and it is not possible for anyone to censor the content of the shared index. We want to achieve freedom of information through a free, distributed web search which is powered by the world's users.

Install YaCy on Ubuntu

Preparing your system

You need to make sure you have Java JDK installed on your system.You can install open JDK using the following command

sudo apt-get install openjdk-7-jre

Now you need to edit /etc/apt/sources.list file

gksudo gedit /etc/apt/sources.list

Add the following line

deb http://debian.yacy.net ./

Save and exit the file

Update the source list

sudo apt-get update

Install yacy using the following command

sudo apt-get install yacy

YaCy is started automatically after a OS startup, and stopped before shutdown.

You can also start and stop YaCy from the command line with:

sudo /etc/init.d/yacy stop
sudo /etc/init.d/yacy start
sudo /etc/init.d/yacy restart

The YaCy web server runs on port 8090 by default. The administration pages are at


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3 Responses

  1. Philip Casey says:

    Is there an error in deb http://debian.yacy.net ./
    see above?

  2. joedoe47 says:

    what is the default yacy username?

  3. joedoe47 says:

    never mind; found out it’s admin

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