LyX combines the power and flexibility of TeX/LaTeX with the ease of use of a graphical interface. This results in world-class support for creation of mathematical content (via a fully integrated equation editor) and structured documents like academic articles, theses, and books. In addition, staples of scientific authoring such as reference list and index creation come standard. But you can also use LyX to create a letter or a novel or a theatre play or film script. A broad array of ready, well-designed document layouts are built in.
LyX is released under a Free Software/Open Source license, runs on Linux/Unix, Windows, and Mac OS X, and is available in several languages.
LyX 2.2.3 Changelog:
LyX 2.2.3 is the result of on-going efforts to make our stable version more reliable and more stable. We have fixed a number of bugs and made a number of improvements. Most of these are relatively minor. These are detailed in the announcement.
You can download the sources in tar.gz format (also tar.xz). There are also some binaries available.
We can add this PPA to Ubuntu Operating Systems and install LyX with few easy commands.
Open terminal and insert command line...
|$ sudo add-apt-repository ppa:lyx-devel/release
$ sudo apt-get update
$ sudo apt-get install lyx
refer original : https://howto-ubuntunew.blogspot.com/