To upgrade an older release of Ubuntu to the new 18.04 release, just use this command as the superuser.
jason@Yog-Sothoth » ~ » $ sudo do-release-upgrade
This will take a while, but will upgrade your Linux system to the new Ubuntu release.
Make sure that after the upgrade is done, and you are running your new system, to run this command.
jason@Yog-Sothoth » ~ » $ sudo apt autoremove
I had an issue with left-over packages that prevented me from installing Audacious, as there were outdated packages left over that blocked installation due to dependency errors. But autoremove fixed that issue.
The new Gnome terminal has a feature that allows the user to copy text from it as HTML, then paste it in a web page and it will look just like it did in the terminal.
This is a great new way to get terminal information into a blog post.
jason@Yog-Sothoth » ~ » $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=18.04 DISTRIB_CODENAME=bionic DISTRIB_DESCRIPTION="Ubuntu 18.04 LTS"