(optional, but recommended):
dpkg maintains a status database for all installed packages. When a package operation is performed, dpkg updates the status of the relevant packages (e.g., from "Half-Installed" to "Installed"). If the process is terminated abruptly, the database reflects an incomplete state. manual cancellation (Ctrl+C)
by a sudden power loss, manual cancellation (Ctrl+C), or a lost internet connection. It leaves the "database" of installed software in a messy state that must be cleaned up before you can install anything new. Ask Ubuntu Next Step: Are you seeing a specific error message or package name when you run the manual cancellation (Ctrl+C)