Tor is free software and an open network that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security. Tor protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world: it prevents somebody watching your Internet connection from learning what sites you visit, and it prevents the sites you visit from learning your physical location.
Individuals use Tor to keep websites from tracking them and their family members, or to connect to news sites, instant messaging services, or the like when these are blocked by their local Internet providers. Tor’s hidden services let users publish web sites and other services without needing to reveal the location of the site. Individuals also use Tor for socially sensitive communication: chat rooms and web forums for rape and abuse survivors, or people with illnesses.
Please follow the below steps to install TOR browser in ubuntu
Run the following commands in Terminal to install Tor Browser on 32 bit Linux Ubuntu systems:
# cd ~
# wget https://dist.torproject.org/torbrowser/5.0.4/tor-browser-linux32-5.0.4_en-US.tar.xz
# tar -xJvf tor-browser-linux32-*_en-US.tar.xz
# cd tor-browser_en-US/
# ./start-tor-browser.desktop
Run the following commands in Terminal to install Tor Browser on 64 bit Linux Ubuntu systems:
# cd ~
# wget https://dist.torproject.org/torbrowser/5.0.4/tor-browser-linux64-5.0.4_en-US.tar.xz
# tar -xJvf tor-browser-linux64-*_en-US.tar.xz
# cd tor-browser_en-US/
# ./start-tor-browser.deskto
Install Tor Browser on Linux Ubuntu Systems, via PPA
Run the following commands in Terminal to install Tor Browser on Linux Ubuntu systems, via Webupd8 PPA:
# sudo add-apt-repository -y ppa:webupd8team/tor-browser
# sudo apt-get update
# sudo apt-get install tor-browser