The steps for both Linux and Mac are the same. From a terminal, get the `SHA256` hash of your downloaded Monero binary. As an example this guide will use the `Linux, 64bit` GUI binary. Substitute `monero-gui-linux-x64-v0.15.0.1.tar.bz2` with the name of the binary that you downloaded in [section 4.1](#41-get-monero-binary).
The output will look like this, but will be different for each binary file. Your `SHA256` hash should match the one listed in the `hashes.txt` file for your binary file.
This is an advanced guide for Linux, Mac, or Windows operating systems and will make use of the command line. It will walk you through the process of installing the required software, importing the signing key, downloading the necessary files, and finally verifying that your binary is authentic.