As you may know, TeXstudio is an open-source integrated writing environment for creating LaTeX documents. Among others, it has syntax highlighting features, an integrated viewer, reference checking, completion for references and bibliography entries, access to over 1000 mathematical symbols easy and a feature for performing copy/paste/insert new table columns operations with a single click.
The latest version available is TeXstudio 2.12.14, which has been recently released.
Due to the fact that the latest versions of texstudio is available via PPA, installing the software on Ubuntu 18.10 Cosmic Cuttlefish, Ubuntu 18.04 Bionic Beaver, Linux Mint, Elementary OS systems and other Ubuntu derivative systems, you need to add the PPA to your system, update the local repository index and install the texstudio package:
$ sudo add-apt-repository ppa:sunderme/texstudio
$ sudo apt-get update
$ sudo apt-get install texstudio
Optional, to remove texstudio, do:
$ sudo apt-get remove texstudio