CMAKE

source: askubuntu

installation by a PPA (Upgrade to 3.2)

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:george-edison55/cmake-3.x
sudo apt-get update
When cmake is not yet installed:

sudo apt-get install cmake
When cmake is already installed:

sudo apt-get upgrade
Compile it yourself

Currently, the latest version is 3.2.2, the following instructions based on this version. You should therefore check this URL and adjust the file name accordingly.

sudo apt-get install build-essential
wget http://www.cmake.org/files/v3.2/cmake-3.2.2.tar.gz
tar xf cmake-3.2.2.tar.gz
cd cmake-3.2.2
./configure
make
Now you can have to choose an installation type to decide, I recommend installing with checkinstall, as this creates a DEB package.

With checkinstall

sudo apt-get install checkinstall
sudo checkinstall
With make install

sudo make install