Fellow Forum Members,
I have a new Ubuntu 18 LTS installation on my Intel x86 Dell Laptop and my goal is to install Bitcoin Core 0.18.1. Below in BOLD is the X86 64bit tarball file I downloaded from this site: https://bitcoincore.org/en/download/ . Unfortunately, this tarball file includes no Installation README file which would have been very helpful to somebody with weak Ubuntu skills:

bitcoin-0.18.1-x86_64-linux-gnu.tar.gz

What is confusing me is how Ubuntu has various methods available to install applications. Therefore, my question is what is the best method to use for installing Bitcoin Core 0.18.1 onto a new Ubuntu LTS system?

Google tells me the command below is used in the Ubuntu Terminal to install an application:


However, I am not sure what follows after the "install" part. What is the rest of the text I need to include with the command? Do I need to add "bitcoin.qt" somewhere in the command? And what other commands follow the apt-get install command?

Also I am not clear what dependencies Bitcoin Core needs so it installs correctly?

I hope someone in this community can clarify for me correct Bitcoin Core installation with a brief post that outlines the steps on how to do it. I would be very grateful because my Google searches have all resulted in dead ends due to how none of the searches explain it as a Bitcoin Core version 0.18.1 installation onto an Ubuntu 18 LTS system. Thanks in advance.

Additionally, I learned the PPA installation method poses a security risk. So I want to avoid installing Bitcoin Core using the PPA installation method.  Lastly, I have already successfully verified the tarball file keys using the SHA256SUM.asc file and it checks out correctly.