$ sudo apt-get remove cflow 

Uninstall cflow including dependent package

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

$ sudo apt-get remove --auto-remove cflow 

Use Purging cflow

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

$ sudo apt-get purge cflow 

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 cflow 

See Also,