apt-get remove <name of program>

apt-get purge <name of program>

apt-get purge -y <name of program>

purge
       purge is identical to remove except that packages are removed and purged (any configuration files are deleted too).

--purge
       Use purge instead of remove for anything that would be removed. An asterisk ("*") will be displayed next to packages which are scheduled to be purged.  remove --purge is equivalent to the purge command. Configuration Item: APT::Get::Purge.

-y, --yes, --assume-yes
       Automatic yes to prompts; assume "yes" as answer to all prompts and run non-interactively. If an undesirable situation, such as changing a held package, trying to install a unauthenticated package or removing an essential package occurs then apt-get will abort. Configuration Item: APT::Get::Assume-Yes.

remove
       remove is identical to install except that packages are removed
       instead of installed. Note that removing a package leaves its
       configuration files on the system. If a plus sign is appended to
       the package name (with no intervening space), the identified
       package will be installed instead of removed.

   purge
       purge is identical to remove except that packages are removed and
       purged (any configuration files are deleted too).

-y, --yes, --assume-yes
       Automatic yes to prompts; assume "yes" as answer to all prompts and
       run non-interactively. If an undesirable situation, such as
       changing a held package, trying to install a unauthenticated
       package or removing an essential package occurs then apt-get will
       abort. Configuration Item: APT::Get::Assume-Yes.