A tutorial on how to use Tomb to encrypt files in Linux was published by MakeTechEasier.
How to Encrypt Files in Linux with Tomb
Tomb is a simple shell script that allows you to encrypt files in Linux. Unlike full disk encryption, Tomb enables you to only include the files and folders that you want to encrypt. Here we show you how to install and use Tomb on Ubuntu.
How to Encrypt Files in Linux with Tomb