Open PHA standard for Linux is installed using an AppImage. AppImage’s are somewhat new so If you haven’t used them before you can learn more here https://appimage.org/. Installation with AppImages couldn’t be easier, just follow the steps below.
First, download the AppImage file and relocate it from your downloads folder to a permanent location (you should not delete or move the AppImage File – it is required to run Open PHA even after installation).
Second, make the AppImage executable. From terminal, navigate to the folder where the AppImage is saved and type of the following command, where #.#.# is the Open PHA version number of the downloaded AppImage.
chmod +x open-pha-#.#.#-x86_64.AppImage
Last, run the AppImage by double-clicking it.