This tutorial shows how to use eCryptfs to encrypt a directory on Ubuntu 16.04. eCryptfs is a POSIX-compliant enterprise-class stacked cryptographic filesystem for Linux. You can use it to encrypt partitions and also directories that don’t use a partition of their own, no matter the underlying filesystem, partition type, etc.
Read the complete article: https://www.howtoforge.com/tutorial/how-to-encrypt-directories-with-ecryptfs-on-ubuntu-16-04/
