$ sudo apt-get remove red5-server 

Uninstall red5-server including dependent package

If you would like to remove red5-server and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove red5-server 

Use Purging red5-server

If you use with purge options to red5-server package all the configuration and dependent packages will be removed.

$ sudo apt-get purge red5-server 

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 red5-server 

See Also,