$ sudo apt-get remove fnfx-client 

Uninstall fnfx-client including dependent package

If you would like to remove fnfx-client and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove fnfx-client 

Use Purging fnfx-client

If you use with purge options to fnfx-client package all the configuration and dependent packages will be removed.

$ sudo apt-get purge fnfx-client 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove fnfx-client 

See Also,