# Bugs Technical reference for Launchpad’s bug tracking system, including bug attachments, subscriptions, expiry policies, heat calculations, and the email interface, plus multi-project bug management and bug integration with other Launchpad features. #### IMPORTANT This document has been migrated from help.launchpad.net as is, and has not yet been revised. The content might be outdated, links and images could be broken. We are aware and will fix any issues as soon as possible. * [Bug attachment](https://ubuntu.com/docs/launchpad/user/reference/bugs/bug-attachment/index.html.md) * [Bug expiry](https://ubuntu.com/docs/launchpad/user/reference/bugs/bug-expiry/index.html.md) * [Bug heat](https://ubuntu.com/docs/launchpad/user/reference/bugs/bug-heat/index.html.md) * [Bug subscription](https://ubuntu.com/docs/launchpad/user/reference/bugs/bug-subscription/index.html.md) * [Email interface command reference](https://ubuntu.com/docs/launchpad/user/reference/bugs/email-interface-command-reference/index.html.md) * [Multi-project bugs](https://ubuntu.com/docs/launchpad/user/reference/bugs/multi-project-bugs/index.html.md) * [Roles](https://ubuntu.com/docs/launchpad/user/reference/bugs/roles/index.html.md) * [The Malone xmlrpc interface](https://ubuntu.com/docs/launchpad/user/reference/bugs/malone-xmlrpc-interface/index.html.md) * [Turning a bug into a question](https://ubuntu.com/docs/launchpad/user/reference/bugs/bug-to-question/index.html.md)