It helps developers by providing all you can expect from a general purpose text editor, such as syntax highlighting for more than 100 different languages, code folding, color schemes, file monitoring, multiple selection and much more.
You can search text using the power of regular expressions. You can organize documents side by side. You can use real-time highlighting to find near identifiers in no time.
Install Notepadqq on Ubuntu
Open the terminal and run the following commands
sudo add-apt-repository ppa:notepadqq-team/notepadqq
sudo apt-get update
sudo apt-get install notepadqq