How to install Qt on Ubuntu

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Introduction This tutorial gives instrustions how to install Qt 5.9.0 on Ubuntu 16.04. Perhaps it can be used for newer versions of Qt and Ubuntu too. A difference for OpenGL has been found and added as a note below.


How to fix a Git detached head

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HEAD is the symbolic name for the currently checked out commit. When HEAD is not detached (the “normal”1 situation: you have a branch checked out), HEAD actually points to a branch’s “ref” and the branch points to the commit. HEAD is thus “attached” to a branch. When you make a new commit, the branch that […]