In a previous article, I described how it's possible to Install and use cmake 3.4.1 in Ubuntu 14.04 using alternatives.
Since then a couple of new versions were released and the same procedure can still be used to install cmake 3.10.1.
Download and compile:
tar -xvzf cmake-3.4.1.tar.gz
Make's install command installs cmake by default in /usr/local/bin/cmake, shared files are installed into /usr/local/share/cmake-3.10.
To install (copy) the binary and libraries to the new destination, run:
sudo make install
If you haven't already installed a newer cmake installation, run the following command to tell Ubuntu that the cmake command is now being replaced by an alternative installation:
sudo update-alternatives --install /usr/bin/cmake cmake /usr/local/bin/cmake 1 --force
If you already have a custom cmake version installed (in my case I still had the 3.4.1 version active), the update-alternatives command is not necessary. The make install command will replace the existing binary in /usr/local/bin/cmake. This can be verified using:
cmake version 3.10.1
CMake suite maintained and supported by Kitware (kitware.com/cmake).