I searched utorrent site, but it is given for lower versions of ubuntu. Which one do you suggest ?
Ubuntu comes with Transmission. You can also use deluge which a lot of people like. To get Deluge just use:
sudo apt-get install deluge
I also recommend using a VPN to keep your IP safe/hidden. Very big deal these days.
Private Internet Access is my favorite, it costs a few bucks a month but it is secure and they don't keep logs which is kinda a big deal too.