Must - Read for Beginners: Ubuntu Software Uninstallation (remove vs purge)

In Ubuntu, the common commands for uninstalling software are `apt remove` and `apt purge`, which often confuse new users due to their similar appearance. Both require `sudo` privileges. `remove` only uninstalls the software package while retaining configuration files (e.g., settings), making it suitable for reinstallation when you want to preserve previous settings. In contrast, `purge` completely removes the software package, its configuration files, and associated dependencies, which is ideal for thorough cleanup to avoid residual interference. Residual configuration files may cause conflicts between old settings and new software versions after reinstallation. You can check if a package is completely uninstalled using `dpkg -l | grep 包名` or `dpkg -s 包名`. If unsure, start with `remove` first; if residual configurations affect functionality, use `purge` to perform a complete removal. Summary: `remove` is a lightweight option that preserves settings, while `purge` performs a thorough deletion of configurations. Choose the appropriate command based on your needs.