$ sudo apt-get update
$ sudo apt-get install libcephfs-jni 

libcephfs-jni is installed in your system.

Make ensure the libcephfs-jni package were installed using the commands given below,

$ sudo dpkg-query -l | grep libcephfs-jni *

You will get with libcephfs-jni package name, version, architecture and description in a table

libcephfs-jni package basic information: