ecryptfs-utils software package provides ecryptfs cryptographic filesystem (utilities), you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ecryptfs-utils
ecryptfs-utils is installed in your system.
Make ensure the ecryptfs-utils package were installed using the commands given below,
$ sudo dpkg-query -l | grep ecryptfs-utils *
You will get with ecryptfs-utils package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Miscellaneous |
| Package | ecryptfs-utils |
| Version | 111-0ubuntu1.1 [amd64, i386], |
| Description | ecryptfs cryptographic filesystem (utilities) |
| Sub Section | Misc |