$ sudo apt-get remove ike-scan 

Uninstall ike-scan including dependent package

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

$ sudo apt-get remove --auto-remove ike-scan 

Use Purging ike-scan

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

$ sudo apt-get purge ike-scan 

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 ike-scan 

See Also,