extundelete software package provides utility to recover deleted files from ext3/ext4 partition, 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 extundelete
extundelete is installed in your system.
Make ensure the extundelete package were installed using the commands given below,
$ sudo dpkg-query -l | grep extundelete *
You will get with extundelete package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Utilities |
| Package | extundelete |
| Version | 0.2.4-1 |
| Description | utility to recover deleted files from ext3/ext4 partition |
| Sub Section | Utils |