Aptitude is preferred, but other approaches can be used if desired.

Issue the command:

sudo aptitude remove package_name

Multiple packages to be removed at once. Separated each package_name with a space.

Use the purge option to remove the package configuration files as well. This may or may not be the desired effect, so use with caution.

sudo aptitude purge package_name

Issue the command:

sudo dpkg -r package_name

WARNING: Uninstalling packages using dpkg, in most cases, is NOT recommended. It is better to use a package manager that handles dependencies to ensure that the system is in a consistent state. For example using dpkg -r zip will remove the zip package, but any packages that depend on it will still be installed and may no longer function correctly.