$ sudo apt-get remove pegasus-wms 

Uninstall pegasus-wms including dependent package

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

$ sudo apt-get remove --auto-remove pegasus-wms 

Use Purging pegasus-wms

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

$ sudo apt-get purge pegasus-wms 

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 pegasus-wms 

See Also,