$ sudo apt-get remove p0f 

Uninstall p0f including dependent package

If you would like to remove p0f and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove p0f 

Use Purging p0f

If you use with purge options to p0f package all the configuration and dependent packages will be removed.

$ sudo apt-get purge p0f 

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 p0f 

See Also,