# Internals

* [Environment variables](https://canonical.com/lxd/docs/default/environment/index.html.md)
* [UEFI variables for VMs](https://canonical.com/lxd/docs/default/reference/uefi_variables/index.html.md)
* [Daemon behavior](https://canonical.com/lxd/docs/default/daemon-behavior/index.html.md)
* [System call interception](https://canonical.com/lxd/docs/default/syscall-interception/index.html.md)
* [User namespace setup](https://canonical.com/lxd/docs/default/userns-idmap/index.html.md)
* [OVN implementation](https://canonical.com/lxd/docs/default/reference/ovn-internals/index.html.md)
* [VM live migration implementation](https://canonical.com/lxd/docs/default/reference/vm_live_migration_internals/index.html.md)
* [Dqlite](https://canonical.com/lxd/docs/default/reference/dqlite-internals/index.html.md)

## Related topics

How-to guides:

- [Troubleshooting](https://canonical.com/lxd/docs/default/howto/troubleshoot/index.html.md#troubleshoot)