$ git clone https://github.com/notepadqq/notepadqq.git
$ cd notepadqq

notepadqq$ ./configure --prefix /usr
notepadqq$ make

You can run notepadqq from its build output folder. If however you want to install it, first build it by following the above steps, then run

notepadqq$ sudo make install

Notepadqq might work on Qt 5.2, but it's recommended to use Qt 5.3 or later. If the newest version isn't available on your distribution, you can use the online installer to get the latest libraries and install them into your home directory ($HOME/Qt). Notepadqq will automatically use them.

Notepadqq is available from an official PPA:

sudo add-apt-repository ppa:notepadqq-team/notepadqq
sudo apt-get update
sudo apt-get install notepadqq

Download a deb package from the Ubuntu PPA: download

You can install different versions of the package from AUR:

• Stable (pre-built Debian package): notepadqq-bin
• Development (git version): notepadqq-git

Use a package for a compatible distribution, or build from source. If you want to submit a package: https://github.com/notepadqq/notepadqq-packaging