i3 is a tiling window manager, tiling window manager is non-overlapping frames of application windows. it will look like this
Installing on ubuntu GNOME/Unity:
sudo echo "deb http://debian.sur5r.net/i3/ $(lsb_release -c -s) universe" >> /etc/apt/sources.list sudo apt-get update sudo apt-get --allow-unauthenticated install sur5r-keyring sudo apt-get update sudo apt-get install i3
This will install i3wm in ubuntu. Now to switch to i3, logout of current session.
In login page, you can find circle icon above your user account, click on it and select i3.
When you login, it will immediatley ask you if you want to create an config file, press enter and generate a config file.
Generally Modifier key is "Windows Key".
Modifer+ Enter ---> open terminal.
you can now use your windows tiling manager.
If you're planning to only use i3, then most of you're applications useful in Ubuntu like nautilus..,etc becomes bloatware, so install ubuntu server image. Then use above commands to install i3wm, Also Install
# install display drivers sudo apt-get install xorg # start i3 startx
This will start i3 manager by default since there is no other GUI modes (like gnome, unity, xcfe) ..etc.,