6. Package maintainer scripts and installation procedure

• 6.1. Introduction to package maintainer scripts
• 6.2. Maintainer scripts idempotency
• 6.3. Controlling terminal for maintainer scripts
• 6.4. Exit status
• 6.5. Summary of ways maintainer scripts are called
• 6.6. Details of unpack phase of installation or upgrade
• 6.7. Details of configuration
• 6.8. Details of removal and/or configuration purging