$ sudo apt-get remove libj2ssh-java 

Uninstall libj2ssh-java including dependent package

If you would like to remove libj2ssh-java and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libj2ssh-java 

Use Purging libj2ssh-java

If you use with purge options to libj2ssh-java package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libj2ssh-java 

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 libj2ssh-java 

See Also,