CMake install

How can I get the latest version?
Well, we can install it by following one of this methods:

Building and Installing (recommended)
Uninstall the default version provided by Ubuntu's package manager:

sudo apt remove cmake
sudo apt purge --auto-remove cmake
Go to the official CMake webpage, then download and extract the latest version. Update the version and build variables in the following command to get the desired version:

version=3.12
build=0
mkdir ~/temp
cd ~/temp
wget https://cmake.org/files/v$version/cmake-$version.$build.tar.gz
tar -xzvf cmake-$version.$build.tar.gz
cd cmake-$version.$build/
Install the extracted source by running:

./bootstrap
make -j4
sudo make install
Test your new cmake version.

$ cmake --version
Results of cmake --version:

cmake version 3.12.X

CMake suite maintained and supported by Kitware (kitware.com/cmake).

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sudo ln -s /usr/local/bin/cmake /usr/bin/cmake