Revert "docs: use collections to structure the data"

This reverts commit 5e8ff010a1436d33bbf3c108335af6e0b4ff7a2a.

This broke all the URLs, we can't have that. (And actually, we probably don't
_want_ to make the change either. It's nicer to have all the pages in one
directory, so one doesn't have to figure out to which collection the page
belongs.)

80 files changed, 95 insertions, 141 deletions

diff --git a/docs/_userdocs/API_FILE_SYSTEMS.md b/docs/API_FILE_SYSTEMS.md
index a7e350b7aa..84a1900e41 100644
--- a/docs/_userdocs/API_FILE_SYSTEMS.md
+++ b/docs/API_FILE_SYSTEMS.md
@@ -50,4 +50,3 @@ You have three options:
 1. Disable any mounting on `/tmp` so that it resides on the same physical file system as the root directory. For that, execute `systemctl mask tmp.mount`
 2. Mount a different, physical file system to `/tmp`. For that, simply create an entry for it in `/etc/fstab` as you would do for any other file system.
 3. Keep `/tmp` but increase/decrease the size of it. For that, also just create an entry for it in `/etc/fstab` as you would do for any other `tmpfs` file system, and use the right `size=` option.
-
diff --git a/docs/_contributing/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 1478ea0ef2..33486203a6 100644
--- a/docs/_contributing/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -145,7 +145,7 @@ as a normal executable and executed for each of the input samples under
 with sanitizers and invoked as part of the test suite (if `-Dfuzz-tests=true`
 is configured). Thirdly, fuzzers are executed through fuzzing engines that try
 to find new "interesting" inputs through coverage feedback and massive
-parallelization; see the links for oss-fuzz in [Code quality](CODE_QUALITY).
+parallelization; see the links for oss-fuzz in [Code quality](CODE_QUALITY.md).
 For testing and debugging, fuzzers can be executed as any other program,
 including under `valgrind` or `gdb`.
 
diff --git a/docs/_booting/AUTOMATIC_BOOT_ASSESSMENT.md b/docs/AUTOMATIC_BOOT_ASSESSMENT.md
index 2fbf86ec6a..2fbf86ec6a 100644
--- a/docs/_booting/AUTOMATIC_BOOT_ASSESSMENT.md
+++ b/docs/AUTOMATIC_BOOT_ASSESSMENT.md
diff --git a/docs/_devdocs/AUTOPKGTEST.md b/docs/AUTOPKGTEST.md
index 393b74e6b9..393b74e6b9 100644
--- a/docs/_devdocs/AUTOPKGTEST.md
+++ b/docs/AUTOPKGTEST.md
diff --git a/docs/_devdocs/BACKPORTS.md b/docs/BACKPORTS.md
index 6fbb57dd88..6fbb57dd88 100644
--- a/docs/_devdocs/BACKPORTS.md
+++ b/docs/BACKPORTS.md
diff --git a/docs/_interfaces/BLOCK_DEVICE_LOCKING.md b/docs/BLOCK_DEVICE_LOCKING.md
index a6e3374bc7..a6e3374bc7 100644
--- a/docs/_interfaces/BLOCK_DEVICE_LOCKING.md
+++ b/docs/BLOCK_DEVICE_LOCKING.md
diff --git a/docs/_devdocs/BOOT.md b/docs/BOOT.md
index 98bcc2ef3d..574cc080cf 100644
--- a/docs/_devdocs/BOOT.md
+++ b/docs/BOOT.md
@@ -109,4 +109,3 @@ Links:
 [https://github.com/systemd/systemd](https://github.com/systemd/systemd)
 
 [http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec/](http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec/)
-
diff --git a/docs/_booting/BOOT_LOADER_INTERFACE.md b/docs/BOOT_LOADER_INTERFACE.md
index a1f6b59568..f915cbacc9 100644
--- a/docs/_booting/BOOT_LOADER_INTERFACE.md
+++ b/docs/BOOT_LOADER_INTERFACE.md
@@ -78,7 +78,7 @@ variables. All EFI variables use the vendor UUID
   * `1 << 1` → The boot loader honours `LoaderConfigTimeoutOneShot` when set.
   * `1 << 2` → The boot loader honours `LoaderEntryDefault` when set.
   * `1 << 3` → The boot loader honours `LoaderEntryOneShot` when set.
-  * `1 << 4` → The boot loader supports boot counting as described in [Automatic Boot Assessment](AUTOMATIC_BOOT_ASSESSMENT).
+  * `1 << 4` → The boot loader supports boot counting as described in [Automatic Boot Assessment](AUTOMATIC_BOOT_ASSESSMENT.md).
   * `1 << 5` → The boot loader supports looking for boot menu entries in the Extended Boot Loader Partition.
   * `1 << 6` → The boot loader supports passing a random seed to the OS.
   * `1 << 13` → The boot loader honours `menu-disabled` option when set.
diff --git a/docs/_booting/BOOT_LOADER_SPECIFICATION.md b/docs/BOOT_LOADER_SPECIFICATION.md
index 33066b2875..33066b2875 100644
--- a/docs/_booting/BOOT_LOADER_SPECIFICATION.md
+++ b/docs/BOOT_LOADER_SPECIFICATION.md
diff --git a/docs/_concepts/BUILDING_IMAGES.md b/docs/BUILDING_IMAGES.md
index b11afa3a36..b11afa3a36 100644
--- a/docs/_concepts/BUILDING_IMAGES.md
+++ b/docs/BUILDING_IMAGES.md
diff --git a/docs/_devdocs/CATALOG.md b/docs/CATALOG.md
index fa5e7b091e..bcbf5b90bc 100644
--- a/docs/_devdocs/CATALOG.md
+++ b/docs/CATALOG.md
@@ -65,4 +65,3 @@ To add message catalog entries for log messages your application generates, plea
 * Use the [native Journal logging APIs](http://0pointer.de/blog/projects/journal-submit.html) to generate your messages, and define message IDs for all messages you want to add catalog entries for. You may use `journalctl --new-id128` to allocate new message IDs.
 * Write a catalog entry file for your messages and ship them in your package and install them to `/usr/lib/systemd/catalog/` (if you package your software with RPM use `%_journalcatalogdir`)
 * Ensure that after installation of your application's RPM/DEB "`journalctl --update-catalog`" is executed, in order to update the binary catalog index. (if you package your software with RPM use the `%journal_catalog_update` macro to achieve that.)
-
diff --git a/docs/_interfaces/CGROUP_DELEGATION.md b/docs/CGROUP_DELEGATION.md
index 4210a75767..4210a75767 100644
--- a/docs/_interfaces/CGROUP_DELEGATION.md
+++ b/docs/CGROUP_DELEGATION.md
diff --git a/docs/_contributing/CODE_OF_CONDUCT.md b/docs/CODE_OF_CONDUCT.md
index 8e5455d302..8e5455d302 100644
--- a/docs/_contributing/CODE_OF_CONDUCT.md
+++ b/docs/CODE_OF_CONDUCT.md
diff --git a/docs/_contributing/CODE_QUALITY.md b/docs/CODE_QUALITY.md
index 166b307b66..0f983bd299 100644
--- a/docs/_contributing/CODE_QUALITY.md
+++ b/docs/CODE_QUALITY.md
@@ -75,7 +75,7 @@ available functionality:
 
 15. Each PR is automatically tested with [Address Sanitizer](https://clang.llvm.org/docs/AddressSanitizer.html)
     and [Undefined Behavior Sanitizer](https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html).
-    See [Testing systemd using sanitizers](TESTING_WITH_SANITIZERS)
+    See [Testing systemd using sanitizers](TESTING_WITH_SANITIZERS.md)
     for more information.
 
 16. Fossies provides [source code misspelling reports](https://fossies.org/features.html#codespell).
diff --git a/docs/_contributing/CODING_STYLE.md b/docs/CODING_STYLE.md
index 0e76122734..0e76122734 100644
--- a/docs/_contributing/CODING_STYLE.md
+++ b/docs/CODING_STYLE.md
diff --git a/docs/_interfaces/CONTAINER_INTERFACE.md b/docs/CONTAINER_INTERFACE.md
index dcecdecc3e..dcecdecc3e 100644
--- a/docs/_interfaces/CONTAINER_INTERFACE.md
+++ b/docs/CONTAINER_INTERFACE.md
diff --git a/docs/_contributing/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index f599972243..e0f7c1d3ee 100644
--- a/docs/_contributing/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -29,13 +29,13 @@ For older versions that are still supported by your distribution please use resp
 
 ## Security vulnerability reports
 
-See [reporting of security vulnerabilities](SECURITY).
+See [reporting of security vulnerabilities](SECURITY.md).
 
 ## Posting Pull Requests
 
 * Make sure to post PRs only relative to a recent tip of the `main` branch.
-* Follow our [Coding Style](CODING_STYLE) when contributing code. This is a requirement for all code we merge.
-* Please make sure to test your change before submitting the PR. See the [Hacking guide](HACKING) for details on how to do this.
+* Follow our [Coding Style](CODING_STYLE.md) when contributing code. This is a requirement for all code we merge.
+* Please make sure to test your change before submitting the PR. See the [Hacking guide](HACKING.md) for details on how to do this.
 * Make sure to run the test suite locally, before posting your PR. We use a CI system, meaning we don't even look at your PR if the build and tests don't pass.
 * If you need to update the code in an existing PR, force-push into the same branch, overriding old commits with new versions.
 * After you have pushed a new version, add a comment explaining the latest changes. If you are a member of the systemd project on GitHub, remove the `reviewed/needs-rework`/`ci-fails/needs-rework`/`needs-rebase` labels.
diff --git a/docs/_devdocs/CONTROL_GROUP_INTERFACE.md b/docs/CONTROL_GROUP_INTERFACE.md
index 1b9728e1b0..1b9728e1b0 100644
--- a/docs/_devdocs/CONTROL_GROUP_INTERFACE.md
+++ b/docs/CONTROL_GROUP_INTERFACE.md
diff --git a/docs/_groups/CONVERTING_TO_HOMED.md b/docs/CONVERTING_TO_HOMED.md
index 5416a22276..06fc66f195 100644
--- a/docs/_groups/CONVERTING_TO_HOMED.md
+++ b/docs/CONVERTING_TO_HOMED.md
@@ -16,10 +16,10 @@ it might be desirable to convert an existing, traditional user account to a
 
 Before continuing, please read up on these basic concepts:
 
-* [Home Directories](HOME_DIRECTORY)
-* [JSON User Records](USER_RECORD)
-* [JSON Group Records](GROUP_RECORD)
-* [User/Group Record Lookup API via Varlink](USER_GROUP_API)
+* [Home Directories](HOME_DIRECTORY.md)
+* [JSON User Records](USER_RECORD.md)
+* [JSON Group Records](GROUP_RECORD.md)
+* [User/Group Record Lookup API via Varlink](USER_GROUP_API.md)
 
 ## Caveat
 
diff --git a/docs/_concepts/COREDUMP.md b/docs/COREDUMP.md
index c64579e2fd..c64579e2fd 100644
--- a/docs/_concepts/COREDUMP.md
+++ b/docs/COREDUMP.md
diff --git a/docs/_concepts/CREDENTIALS.md b/docs/CREDENTIALS.md
index ed30eacf2b..153a42be54 100644
--- a/docs/_concepts/CREDENTIALS.md
+++ b/docs/CREDENTIALS.md
@@ -59,7 +59,7 @@ purpose. Specifically, the following features are provided:
 8. Credentials are an effective way to pass parameters into services that run
    with `RootImage=` or `RootDirectory=` and thus cannot read these resources
    directly from the host directory tree.
-   Specifically, [Portable Services](PORTABLE_SERVICES) may be
+   Specifically, [Portable Services](PORTABLE_SERVICES.md) may be
    parameterized this way securely and robustly.
 
 9. Credentials can be binary and relatively large (though currently an overall
@@ -288,7 +288,7 @@ services where they are ultimately consumed.
    invokes. [`systemd-nspawn(1)`](https://www.freedesktop.org/software/systemd/man/systemd-nspawn.html#Credentials)'s
    `--set-credential=` and `--load-credential=` switches implement this, in
    order to pass arbitrary credentials from host to container payload. Also see
-   the [Container Interface](CONTAINER_INTERFACE) documentation.
+   the [Container Interface](CONTAINER_INTERFACE.md) documentation.
 
 2. Quite similar, VMs can be passed credentials via SMBIOS OEM strings (example
    qemu command line switch `-smbios
diff --git a/docs/_userdocs/DAEMON_SOCKET_ACTIVATION.md b/docs/DAEMON_SOCKET_ACTIVATION.md
index 797deaefd0..1a027a37c8 100644
--- a/docs/_userdocs/DAEMON_SOCKET_ACTIVATION.md
+++ b/docs/DAEMON_SOCKET_ACTIVATION.md
@@ -120,4 +120,3 @@ It's possible to shut down the service and re-activate it using the web browser,
 sudo systemctl stop my-php-fpm-pool.socket my-php-fpm-pool.service
 sudo systemctl start my-php-fpm-pool.socket
 ```
-
diff --git a/docs/_userdocs/DEBUGGING.md b/docs/DEBUGGING.md
index 1d3d829a3f..dc1c8743b4 100644
--- a/docs/_userdocs/DEBUGGING.md
+++ b/docs/DEBUGGING.md
@@ -209,4 +209,3 @@ Whenever possible, the following should be mentioned and attached to your bug re
   * ideally after booting with `systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on`
 * The output of a systemd dump: `systemd-analyze dump > systemd-dump.txt`
 * The output of `/usr/lib/systemd/systemd --test --system --log-level=debug > systemd-test.txt 2>&1`
-
diff --git a/docs/_concepts/DESKTOP_ENVIRONMENTS.md b/docs/DESKTOP_ENVIRONMENTS.md
index 0a0eff6539..0a0eff6539 100644
--- a/docs/_concepts/DESKTOP_ENVIRONMENTS.md
+++ b/docs/DESKTOP_ENVIRONMENTS.md
diff --git a/docs/_concepts/DISTRO_PORTING.md b/docs/DISTRO_PORTING.md
index c95a8292a9..c95a8292a9 100644
--- a/docs/_concepts/DISTRO_PORTING.md
+++ b/docs/DISTRO_PORTING.md
diff --git a/docs/_interfaces/ELF_PACKAGE_METADATA.md b/docs/ELF_PACKAGE_METADATA.md
index 6cb3f785b4..6cb3f785b4 100644
--- a/docs/_interfaces/ELF_PACKAGE_METADATA.md
+++ b/docs/ELF_PACKAGE_METADATA.md
diff --git a/docs/_interfaces/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index eab1ce23e4..eab1ce23e4 100644
--- a/docs/_interfaces/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
diff --git a/docs/_userdocs/FAQ.md b/docs/FAQ.md
index 5239dbb0e5..483645b1e7 100644
--- a/docs/_userdocs/FAQ.md
+++ b/docs/FAQ.md
@@ -112,4 +112,3 @@ A: That's a long story, and that's why we have a wiki page of its own about this
 **Q: My systemd system always comes up with `/tmp` as a tiny `tmpfs`. How do I get rid of this?**
 
 A: That's also a long story, please have a look on [API File Systems](../API_FILE_SYSTEMS)
-
diff --git a/docs/_interfaces/FILE_DESCRIPTOR_STORE.md b/docs/FILE_DESCRIPTOR_STORE.md
index 206dda7038..206dda7038 100644
--- a/docs/_interfaces/FILE_DESCRIPTOR_STORE.md
+++ b/docs/FILE_DESCRIPTOR_STORE.md
diff --git a/docs/_groups/GROUP_RECORD.md b/docs/GROUP_RECORD.md
index f463b0a2a7..c9d51cef9d 100644
--- a/docs/_groups/GROUP_RECORD.md
+++ b/docs/GROUP_RECORD.md
@@ -8,7 +8,7 @@ SPDX-License-Identifier: LGPL-2.1-or-later
 # JSON Group Records
 
 Long story short: JSON Group Records are to `struct group` what
-[JSON User Records](USER_RECORD) are to `struct passwd`.
+[JSON User Records](USER_RECORD.md) are to `struct passwd`.
 
 Conceptually, much of what applies to JSON user records also applies to JSON
 group records. They also consist of seven sections, with similar properties and
diff --git a/docs/_contributing/HACKING.md b/docs/HACKING.md
index 270c39b587..bd792092f7 100644
--- a/docs/_contributing/HACKING.md
+++ b/docs/HACKING.md
@@ -11,8 +11,8 @@ We welcome all contributions to systemd. If you notice a bug or a missing
 feature, please feel invited to fix it, and submit your work as a
 [GitHub Pull Request (PR)](https://github.com/systemd/systemd/pull/new).
 
-Please make sure to follow our [Coding Style](CODING_STYLE) when submitting
-patches. Also have a look at our [Contribution Guidelines](CONTRIBUTING).
+Please make sure to follow our [Coding Style](CODING_STYLE.md) when submitting
+patches. Also have a look at our [Contribution Guidelines](CONTRIBUTING.md).
 
 When adding new functionality, tests should be added. For shared functionality
 (in `src/basic/` and `src/shared/`) unit tests should be sufficient. The general
@@ -23,7 +23,7 @@ test executable. For features at a higher level, tests in `src/test/` are very
 strongly recommended. If that is not possible, integration tests in `test/` are
 encouraged.
 
-Please also have a look at our list of [code quality tools](CODE_QUALITY) we
+Please also have a look at our list of [code quality tools](CODE_QUALITY.md) we
 have setup for systemd, to ensure our codebase stays in good shape.
 
 Please always test your work before submitting a PR. For many of the components
@@ -148,7 +148,7 @@ distribution and can be disabled by setting `-Dmode=release`.
 
 ## Sanitizers in mkosi
 
-See [Testing systemd using sanitizers](TESTING_WITH_SANITIZERS) for more information
+See [Testing systemd using sanitizers](TESTING_WITH_SANITIZERS.md) for more information
 on how to build with sanitizers enabled in mkosi.
 
 ## Fuzzers
@@ -211,7 +211,7 @@ done
 ```
 
 If you find a bug that impacts the security of systemd, please follow the
-guidance in [CONTRIBUTING.md](CONTRIBUTING) on how to report a security vulnerability.
+guidance in [CONTRIBUTING.md](CONTRIBUTING.md) on how to report a security vulnerability.
 
 For more details on building fuzzers and integrating with OSS-Fuzz, visit:
 
diff --git a/docs/_groups/HOME_DIRECTORY.md b/docs/HOME_DIRECTORY.md
index f1b7fafed9..f6e061bd2b 100644
--- a/docs/_groups/HOME_DIRECTORY.md
+++ b/docs/HOME_DIRECTORY.md
@@ -19,7 +19,7 @@ mechanism used.
 
 Inside of the home directory a file `~/.identity` contains the JSON formatted
 user record of the user. It follows the format defined in
-[`JSON User Records`](USER_RECORD). It is recommended to bring the
+[`JSON User Records`](USER_RECORD.md). It is recommended to bring the
 record into 'normalized' form (i.e. all objects should contain their fields
 sorted alphabetically by their key) before storing it there, though this is not
 required nor enforced. Since the user record is cryptographically signed, the
diff --git a/docs/_userdocs/INCOMPATIBILITIES.md b/docs/INCOMPATIBILITIES.md
index be256deaf2..a7a2c1b827 100644
--- a/docs/_userdocs/INCOMPATIBILITIES.md
+++ b/docs/INCOMPATIBILITIES.md
@@ -13,7 +13,7 @@ systemd provides a fair degree of compatibility with the behavior exposed by the
 * LSB header dependency information matters. The SysV implementations on many distributions did not use the dependency information encoded in LSB init script headers, or used them only in very limited ways. Due to that they are often incorrect or incomplete. systemd however fully interprets these headers and follows them closely at runtime (and not at installation time like some implementations).
 * Timeouts apply to all init script operations in systemd. While on SysV systems a hanging init script could freeze the system on systemd all init script operations are subject to a timeout of 5min.
 * Services are executed in completely clean execution contexts, no context of the invoking user session is inherited. Not even $HOME or similar are set. Init scripts depending on these will not work correctly.
-* Services cannot read from stdin, as this will be connected to /dev/null. That means interactive init scripts are not supported (i.e. Debian's X-Interactive in the LSB header is not supported either.) Thankfully most distributions do not support interaction in init scripts anyway. If you need interaction to ask disk or SSL passphrases please consider using the minimal password querying framework systemd supports. ([details](PASSWORD_AGENTS), [manual page](http://0pointer.de/public/systemd-man/systemd-ask-password.html))
+* Services cannot read from stdin, as this will be connected to /dev/null. That means interactive init scripts are not supported (i.e. Debian's X-Interactive in the LSB header is not supported either.) Thankfully most distributions do not support interaction in init scripts anyway. If you need interaction to ask disk or SSL passphrases please consider using the minimal password querying framework systemd supports. ([details](../PASSWORD_AGENTS), [manual page](http://0pointer.de/public/systemd-man/systemd-ask-password.html))
 * Additional verbs for init scripts are not supported. If your init script traditionally supported additional verbs for your init script simply move them to an auxiliary script.
 * Additional parameters to the standard verbs (i.e. to "start", "stop" and "status") are not supported. This was an extension of SysV that never was standardized officially, and is not supported in systemd.
 * Overriding the "restart" verb is not supported. This verb is always implemented by systemd itself, and consists of a "stop" followed by a "start".
diff --git a/docs/_devdocs/INHIBITOR_LOCKS.md b/docs/INHIBITOR_LOCKS.md
index 61efdc2029..61efdc2029 100644
--- a/docs/_devdocs/INHIBITOR_LOCKS.md
+++ b/docs/INHIBITOR_LOCKS.md
diff --git a/docs/_interfaces/INITRD_INTERFACE.md b/docs/INITRD_INTERFACE.md
index 0461ae2607..4e856f8917 100644
--- a/docs/_interfaces/INITRD_INTERFACE.md
+++ b/docs/INITRD_INTERFACE.md
@@ -40,7 +40,7 @@ Arch Linux initrds.
   line options, for example `--log-level=` and similar.
 
 * Storage daemons run from the initrd should follow the guide on
-  [systemd and Storage Daemons for the Root File System](ROOT_STORAGE_DAEMONS)
+  [systemd and Storage Daemons for the Root File System](ROOT_STORAGE_DAEMONS.md)
   to survive properly from the boot initrd all the way to the point where
   systemd jumps back into the initrd for shutdown.
 
@@ -67,4 +67,4 @@ systemd. Here are a few terse notes:
 
 * The switch-root operation will result in a killing spree of all running
   processes. Some processes might need to be excluded from that, see the guide
-  on [systemd and Storage Daemons for the Root File System](ROOT_STORAGE_DAEMONS).
+  on [systemd and Storage Daemons for the Root File System](ROOT_STORAGE_DAEMONS.md).
diff --git a/docs/_interfaces/JOURNAL_EXPORT_FORMATS.md b/docs/JOURNAL_EXPORT_FORMATS.md
index e1eb0d36d1..2c4078aed9 100644
--- a/docs/_interfaces/JOURNAL_EXPORT_FORMATS.md
+++ b/docs/JOURNAL_EXPORT_FORMATS.md
@@ -11,7 +11,7 @@ SPDX-License-Identifier: LGPL-2.1-or-later
 
 _Note that this document describes the binary serialization format of journals only, as used for transfer across the network.
 For interfacing with web technologies there's the Journal JSON Format, described below.
-The binary format on disk is documented as the [Journal File Format](JOURNAL_FILE_FORMAT)._
+The binary format on disk is documented as the [Journal File Format](JOURNAL_FILE_FORMAT.md)._
 
 _Before reading on, please make sure you are aware of the [basic properties of journal entries](https://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html), in particular realize that they may include binary non-text data (though usually don't), and the same field might have multiple values assigned within the same entry (though usually hasn't)._
 
@@ -124,7 +124,7 @@ _SOURCE_REALTIME_TIMESTAMP=1423944916372858
 
 _Note that this section describes the JSON serialization format of the journal only, as used for interfacing with web technologies.
 For binary transfer of journal data across the network there's the Journal Export Format described above.
-The binary format on disk is documented as [Journal File Format](JOURNAL_FILE_FORMAT)._
+The binary format on disk is documented as [Journal File Format](JOURNAL_FILE_FORMAT.md)._
 
 _Before reading on, please make sure you are aware of the [basic properties of journal entries](https://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html), in particular realize that they may include binary non-text data (though usually don't), and the same field might have multiple values assigned within the same entry (though usually hasn't)._
 
diff --git a/docs/_interfaces/JOURNAL_FILE_FORMAT.md b/docs/JOURNAL_FILE_FORMAT.md
index e0737c5933..a3edb56c88 100644
--- a/docs/_interfaces/JOURNAL_FILE_FORMAT.md
+++ b/docs/JOURNAL_FILE_FORMAT.md
@@ -46,7 +46,7 @@ _Or, to put this in other words: this low-level document is probably not what
 you want to use as base of your project. You want our [C
 API](https://www.freedesktop.org/software/systemd/man/sd-journal.html) instead!
 And if you really don't want the C API, then you want the
-[Journal Export Format or Journal JSON Format](JOURNAL_EXPORT_FORMATS)
+[Journal Export Format or Journal JSON Format](JOURNAL_EXPORT_FORMATS.md)
 instead! This document is primarily for your entertainment and education.
 Thank you!_
 
diff --git a/docs/_interfaces/JOURNAL_NATIVE_PROTOCOL.md b/docs/JOURNAL_NATIVE_PROTOCOL.md
index ce00d7e1ae..ce00d7e1ae 100644
--- a/docs/_interfaces/JOURNAL_NATIVE_PROTOCOL.md
+++ b/docs/JOURNAL_NATIVE_PROTOCOL.md
diff --git a/docs/_interfaces/MEMORY_PRESSURE.md b/docs/MEMORY_PRESSURE.md
index 69c23eccb2..69c23eccb2 100644
--- a/docs/_interfaces/MEMORY_PRESSURE.md
+++ b/docs/MEMORY_PRESSURE.md
diff --git a/docs/_devdocs/MINIMAL_BUILDS.md b/docs/MINIMAL_BUILDS.md
index faa4f2de07..faa4f2de07 100644
--- a/docs/_devdocs/MINIMAL_BUILDS.md
+++ b/docs/MINIMAL_BUILDS.md
diff --git a/docs/_booting/MOUNT_REQUIREMENTS.md b/docs/MOUNT_REQUIREMENTS.md
index 9ccbd089bf..9ccbd089bf 100644
--- a/docs/_booting/MOUNT_REQUIREMENTS.md
+++ b/docs/MOUNT_REQUIREMENTS.md
diff --git a/docs/_userdocs/MY_SERVICE_CANT_GET_REATLIME.md b/docs/MY_SERVICE_CANT_GET_REATLIME.md
index eee389ad70..20d31fbde7 100644
--- a/docs/_userdocs/MY_SERVICE_CANT_GET_REATLIME.md
+++ b/docs/MY_SERVICE_CANT_GET_REATLIME.md
@@ -26,4 +26,3 @@ Of course, that's quite a limitation, so here's how you work around this:
 Note that this all only applies to services. By default, user applications run in the root cgroup of the "cpu" hierarchy, which avoids these problems for normal user applications.
 
 In the long run we hope that the kernel is fixed to not require an RT budget to be assigned for any cgroup created before a process can acquire RT (i.e. a process' RT budget should be derived from the nearest ancestor cgroup which has a budget assigned, rather than unconditionally its own uninitialized budget.) Ideally, we'd also like to create a per-user cgroup by default, so that users with many processes get roughly the same amount of CPU as users with very few.
-
diff --git a/docs/_networking/NETWORK_ONLINE.md b/docs/NETWORK_ONLINE.md
index b249eb4402..b249eb4402 100644
--- a/docs/_networking/NETWORK_ONLINE.md
+++ b/docs/NETWORK_ONLINE.md
diff --git a/docs/_devdocs/OPTIMIZATIONS.md b/docs/OPTIMIZATIONS.md
index 3c8ac4815a..3c8ac4815a 100644
--- a/docs/_devdocs/OPTIMIZATIONS.md
+++ b/docs/OPTIMIZATIONS.md
diff --git a/docs/_interfaces/PASSWORD_AGENTS.md b/docs/PASSWORD_AGENTS.md
index 29bd949077..29bd949077 100644
--- a/docs/_interfaces/PASSWORD_AGENTS.md
+++ b/docs/PASSWORD_AGENTS.md
diff --git a/docs/_interfaces/PORTABILITY_AND_STABILITY.md b/docs/PORTABILITY_AND_STABILITY.md
index abdc3dc658..2854857d2b 100644
--- a/docs/_interfaces/PORTABILITY_AND_STABILITY.md
+++ b/docs/PORTABILITY_AND_STABILITY.md
@@ -83,9 +83,9 @@ And now, here's the list of (hopefully) all APIs that we have introduced with sy
 | [hostnamed](https://www.freedesktop.org/software/systemd/man/org.freedesktop.hostname1.html) | D-Bus | yes | yes | GNOME | yes | [Ubuntu](https://launchpad.net/ubuntu/+source/ubuntu-system-service), [Gentoo](http://www.gentoo.org/proj/en/desktop/gnome/openrc-settingsd.xml), [BSD](http://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=systembsd.git;a=summary) | partially |
 | [localed](https://www.freedesktop.org/software/systemd/man/org.freedesktop.locale1.html) | D-Bus | yes | yes | GNOME | yes | [Ubuntu](https://launchpad.net/ubuntu/+source/ubuntu-system-service), [Gentoo](http://www.gentoo.org/proj/en/desktop/gnome/openrc-settingsd.xml), [BSD](http://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=systembsd.git;a=summary) | partially |
 | [timedated](https://www.freedesktop.org/software/systemd/man/org.freedesktop.timedate1.html) | D-Bus | yes | yes | GNOME | yes | [Gentoo](http://www.gentoo.org/proj/en/desktop/gnome/openrc-settingsd.xml), [BSD](http://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=systembsd.git;a=summary) | partially |
-| [initrd interface](INITRD_INTERFACE) | Environment, flag files | yes | yes | mkosi, dracut, ArchLinux | yes | ArchLinux | no |
-| [Container interface](CONTAINER_INTERFACE) | Environment, Mounts | yes | yes | libvirt/LXC | yes | - | no |
-| [Boot Loader interface](BOOT_LOADER_INTERFACE) | EFI variables | yes | yes | gummiboot | yes | - | no |
+| [initrd interface](INITRD_INTERFACE.md) | Environment, flag files | yes | yes | mkosi, dracut, ArchLinux | yes | ArchLinux | no |
+| [Container interface](CONTAINER_INTERFACE.md) | Environment, Mounts | yes | yes | libvirt/LXC | yes | - | no |
+| [Boot Loader interface](BOOT_LOADER_INTERFACE.md) | EFI variables | yes | yes | gummiboot | yes | - | no |
 | [Service bus API](https://www.freedesktop.org/software/systemd/man/org.freedesktop.systemd1.html) | D-Bus | yes | yes | system-config-services | no | - | no |
 | [logind](https://www.freedesktop.org/software/systemd/man/org.freedesktop.login1.html) | D-Bus | yes | yes | GNOME | no | - | no |
 | [sd-bus.h API](https://www.freedesktop.org/software/systemd/man/sd-bus.html) | C Library | yes | yes | - | maybe | - | maybe |
@@ -102,15 +102,15 @@ And now, here's the list of (hopefully) all APIs that we have introduced with sy
 | [$XDG_RUNTIME_DIR](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html) | Environment | yes | yes | glib, GNOME | yes | - | no |
 | [$LISTEN_FDS $LISTEN_PID FD Passing](https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html) | Environment | yes | yes | numerous (via sd-daemon.h) | yes | - | no |
 | [$NOTIFY_SOCKET Daemon Notifications](https://www.freedesktop.org/software/systemd/man/sd_notify.html) | Environment | yes | yes | a few, including udev | yes | - | no |
-| [argv&#91;0&#93;&#91;0&#93;='@' Logic](ROOT_STORAGE_DAEMONS) | `/proc` marking | yes | yes | mdadm | yes | - | no |
+| [argv&#91;0&#93;&#91;0&#93;='@' Logic](ROOT_STORAGE_DAEMONS.md) | `/proc` marking | yes | yes | mdadm | yes | - | no |
 | [Unit file format](https://www.freedesktop.org/software/systemd/man/systemd.unit.html) | File format | yes | yes | numerous | no | - | no |
 | [Network](https://www.freedesktop.org/software/systemd/man/systemd.network.html) & [Netdev file format](https://www.freedesktop.org/software/systemd/man/systemd.netdev.html) | File format | yes | yes | no | no | - | no |
 | [Link file format](https://www.freedesktop.org/software/systemd/man/systemd.link.html) | File format | yes | yes | no | no | - | no |
-| [Journal File Format](JOURNAL_FILE_FORMAT) | File format | yes | yes | - | maybe | - | no |
+| [Journal File Format](JOURNAL_FILE_FORMAT.md) | File format | yes | yes | - | maybe | - | no |
 | [Journal Export Format](JOURNAL_EXPORT_FORMATS.md#journal-export-format) | File format | yes | yes | - | yes | - | no |
 | [Journal JSON Format](JOURNAL_EXPORT_FORMATS.md#journal-json-format) | File format | yes | yes | - | yes | - | no |
 | [Cooperation in cgroup tree](https://www.freedesktop.org/wiki/Software/systemd/PaxControlGroups) | Treaty | yes | yes | libvirt | yes | libvirt | no |
-| [Password Agents](PASSWORD_AGENTS) | Socket+Files | yes | yes | - | yes | - | no |
+| [Password Agents](PASSWORD_AGENTS.md) | Socket+Files | yes | yes | - | yes | - | no |
 | [udev multi-seat properties](https://www.freedesktop.org/software/systemd/man/sd-login.html) | udev Property | yes | yes | X11, gdm | no | - | no |
 | udev session switch ACL properties | udev Property | no | no | - | no | - | no |
 | [CLI of systemctl,...](https://www.freedesktop.org/software/systemd/man/systemctl.html) | CLI | yes | yes | numerous | no | - | no |
diff --git a/docs/_concepts/PORTABLE_SERVICES.md b/docs/PORTABLE_SERVICES.md
index 6f5ff112d2..6f5ff112d2 100644
--- a/docs/_concepts/PORTABLE_SERVICES.md
+++ b/docs/PORTABLE_SERVICES.md
diff --git a/docs/_contributing/PORTING_TO_NEW_ARCHITECTURES.md b/docs/PORTING_TO_NEW_ARCHITECTURES.md
index a4dc6c29dd..a4dc6c29dd 100644
--- a/docs/_contributing/PORTING_TO_NEW_ARCHITECTURES.md
+++ b/docs/PORTING_TO_NEW_ARCHITECTURES.md
diff --git a/docs/_networking/PREDICTABLE_INTERFACE_NAMES.md b/docs/PREDICTABLE_INTERFACE_NAMES.md
index 9d79f8f409..9d79f8f409 100644
--- a/docs/_networking/PREDICTABLE_INTERFACE_NAMES.md
+++ b/docs/PREDICTABLE_INTERFACE_NAMES.md
diff --git a/docs/_devdocs/PRESET.md b/docs/PRESET.md
index a2ae323961..a2ae323961 100644
--- a/docs/_devdocs/PRESET.md
+++ b/docs/PRESET.md
diff --git a/docs/_concepts/RANDOM_SEEDS.md b/docs/RANDOM_SEEDS.md
index b2712ca741..8c9b7eee56 100644
--- a/docs/_concepts/RANDOM_SEEDS.md
+++ b/docs/RANDOM_SEEDS.md
@@ -384,7 +384,7 @@ This primarily leaves two kind of systems in the cold:
     for an introduction why. That said, any boot loader can re-implement the
     logic described above, and can pass a random seed that systemd as PID 1
     will then upload into the kernel's entropy pool. For details see the
-    [Boot Loader Interface](BOOT_LOADER_INTERFACE) documentation.
+    [Boot Loader Interface](BOOT_LOADER_INTERFACE.md) documentation.
 
 11. *Why not pass the boot loader random seed via kernel command line instead
     of as EFI variable?*
diff --git a/docs/_contributing/RELEASE.md b/docs/RELEASE.md
index b712ba6b07..b712ba6b07 100644
--- a/docs/_contributing/RELEASE.md
+++ b/docs/RELEASE.md
diff --git a/docs/_networking/RESOLVED-VPNS.md b/docs/RESOLVED-VPNS.md
index dbf43f9a38..dbf43f9a38 100644
--- a/docs/_networking/RESOLVED-VPNS.md
+++ b/docs/RESOLVED-VPNS.md
diff --git a/docs/_interfaces/ROOT_STORAGE_DAEMONS.md b/docs/ROOT_STORAGE_DAEMONS.md
index 69812c9055..1ffebd6498 100644
--- a/docs/_interfaces/ROOT_STORAGE_DAEMONS.md
+++ b/docs/ROOT_STORAGE_DAEMONS.md
@@ -106,7 +106,7 @@ to find a different solution to your problem._
 
 The recommended way to distinguish between run-from-initrd and run-from-rootfs
 for a daemon is to check for `/etc/initrd-release` (which exists on all modern
-initrd implementations, see the [initrd Interface](INITRD_INTERFACE) for
+initrd implementations, see the [initrd Interface](INITRD_INTERFACE.md) for
 details) which when exists results in `argv[0][0]` being set to `@`, and
 otherwise doesn't. Something like this:
 
@@ -191,4 +191,4 @@ few additional notes for supporting these setups:
   program consult this blog story: [Socket
   Activation](https://0pointer.de/blog/projects/socket-activation.html)
 
-* Consider having a look at the [initrd Interface of systemd](INITRD_INTERFACE).
+* Consider having a look at the [initrd Interface of systemd](INITRD_INTERFACE.md).
diff --git a/docs/_contributing/SECURITY.md b/docs/SECURITY.md
index a44b90de89..a44b90de89 100644
--- a/docs/_contributing/SECURITY.md
+++ b/docs/SECURITY.md
diff --git a/docs/_userdocs/SEPARATE_USR_IS_BROKEN.md b/docs/SEPARATE_USR_IS_BROKEN.md
index aa821f4a72..8e9390eff4 100644
--- a/docs/_userdocs/SEPARATE_USR_IS_BROKEN.md
+++ b/docs/SEPARATE_USR_IS_BROKEN.md
@@ -38,4 +38,3 @@ On the Fedora distribution we have succeeded to clean up the situation and the c
 In this new definition of /usr, the directory can be mounted read-only by default, while the rootfs may be either read-write or read-only (for stateless systems) and contains only the empty mount point directories, compat-symlinks to /usr and the host-specific data like /etc, /root, /srv. In comparison to today's setups, the rootfs will be very small. The host-specific data will be properly separated from the installed operating system. The new /usr could also easily be shared read-only across several systems. Such a setup would be more efficient, can provide additional security, is more flexible to use, provides saner options for custom setups, and is much simpler to setup and maintain.
 
 For more information on this please continue to [The Case for the /usr Merge](../THE_CASE_FOR_THE_USR_MERGE).
-
diff --git a/docs/_devdocs/SYSLOG.md b/docs/SYSLOG.md
index 35c6225edb..35c6225edb 100644
--- a/docs/_devdocs/SYSLOG.md
+++ b/docs/SYSLOG.md
diff --git a/docs/_devdocs/SYSTEMD_FILE_HIERARCHY_REQUIREMENTS.md b/docs/SYSTEMD_FILE_HIERARCHY_REQUIREMENTS.md
index 574df93e00..574df93e00 100644
--- a/docs/_devdocs/SYSTEMD_FILE_HIERARCHY_REQUIREMENTS.md
+++ b/docs/SYSTEMD_FILE_HIERARCHY_REQUIREMENTS.md
diff --git a/docs/_interfaces/TEMPORARY_DIRECTORIES.md b/docs/TEMPORARY_DIRECTORIES.md
index bc9cb7bc45..bc9cb7bc45 100644
--- a/docs/_interfaces/TEMPORARY_DIRECTORIES.md
+++ b/docs/TEMPORARY_DIRECTORIES.md
diff --git a/docs/_contributing/TESTING_WITH_SANITIZERS.md b/docs/TESTING_WITH_SANITIZERS.md
index 39920c64d0..39920c64d0 100644
--- a/docs/_contributing/TESTING_WITH_SANITIZERS.md
+++ b/docs/TESTING_WITH_SANITIZERS.md
diff --git a/docs/_devdocs/THE_CASE_FOR_THE_USR_MERGE.md b/docs/THE_CASE_FOR_THE_USR_MERGE.md
index 2cdb6db210..2cdb6db210 100644
--- a/docs/_devdocs/THE_CASE_FOR_THE_USR_MERGE.md
+++ b/docs/THE_CASE_FOR_THE_USR_MERGE.md
diff --git a/docs/_userdocs/TIPS_AND_TRICKS.md b/docs/TIPS_AND_TRICKS.md
index d9a106a922..f181f122a8 100644
--- a/docs/_userdocs/TIPS_AND_TRICKS.md
+++ b/docs/TIPS_AND_TRICKS.md
@@ -183,4 +183,3 @@ $ systemd --test --system --unit=foobar.target
 ```
 
 for a boot target foobar.target. Note that this is mostly a debugging tool that actually does a lot more than just calculate the initial transaction, so don't build scripts based on this.
-
diff --git a/docs/_booting/TPM2_PCR_MEASUREMENTS.md b/docs/TPM2_PCR_MEASUREMENTS.md
index 462a86b36c..462a86b36c 100644
--- a/docs/_booting/TPM2_PCR_MEASUREMENTS.md
+++ b/docs/TPM2_PCR_MEASUREMENTS.md
diff --git a/docs/_interfaces/TRANSIENT-SETTINGS.md b/docs/TRANSIENT-SETTINGS.md
index 15f1cbc47c..15f1cbc47c 100644
--- a/docs/_interfaces/TRANSIENT-SETTINGS.md
+++ b/docs/TRANSIENT-SETTINGS.md
diff --git a/docs/_contributing/TRANSLATORS.md b/docs/TRANSLATORS.md
index 2f578cc6f5..2f578cc6f5 100644
--- a/docs/_contributing/TRANSLATORS.md
+++ b/docs/TRANSLATORS.md
diff --git a/docs/_groups/UIDS-GIDS.md b/docs/UIDS-GIDS.md
index e84f0378ec..e84f0378ec 100644
--- a/docs/_groups/UIDS-GIDS.md
+++ b/docs/UIDS-GIDS.md
diff --git a/docs/_groups/USERDB_AND_DESKTOPS.md b/docs/USERDB_AND_DESKTOPS.md
index 3a3da1317a..9006eeb5ec 100644
--- a/docs/_groups/USERDB_AND_DESKTOPS.md
+++ b/docs/USERDB_AND_DESKTOPS.md
@@ -21,10 +21,10 @@ are recommended. A few areas where that applies are discussed below.
 
 Before reading on, please read up on the basic concepts, specifically:
 
-* [Home Directories](HOME_DIRECTORY)
-* [JSON User Records](USER_RECORD)
-* [JSON Group Records](GROUP_RECORD)
-* [User/Group Record Lookup API via Varlink](USER_GROUP_API)
+* [Home Directories](HOME_DIRECTORY.md)
+* [JSON User Records](USER_RECORD.md)
+* [JSON Group Records](GROUP_RECORD.md)
+* [User/Group Record Lookup API via Varlink](USER_GROUP_API.md)
 
 ## Support for Suspending Home Directory Access during System Suspend
 
@@ -147,7 +147,7 @@ solution only.
 In case you wonder, there's no automatic mechanism for converting existing
 users registered in `/etc/passwd` or LDAP to users managed by
 `systemd-homed`. There's documentation for doing this manually though, see
-[Converting Existing Users to systemd-homed managed Users](CONVERTING_TO_HOMED).
+[Converting Existing Users to systemd-homed managed Users](CONVERTING_TO_HOMED.md).
 
 ## Future Additions
 
diff --git a/docs/_groups/USER_GROUP_API.md b/docs/USER_GROUP_API.md
index 567b8178f2..45e3c9da27 100644
--- a/docs/_groups/USER_GROUP_API.md
+++ b/docs/USER_GROUP_API.md
@@ -7,8 +7,8 @@ SPDX-License-Identifier: LGPL-2.1-or-later
 
 # User/Group Record Lookup API via Varlink
 
-JSON User/Group Records (as described in the [JSON User Records](USER_RECORD)
-and [JSON Group Records](GROUP_RECORD) documents) that are defined on the
+JSON User/Group Records (as described in the [JSON User Records](USER_RECORD.md)
+and [JSON Group Records](GROUP_RECORD.md) documents) that are defined on the
 local system may be queried with a [Varlink](https://varlink.org/) API. This
 API takes both the role of what
 [`getpwnam(3)`](https://man7.org/linux/man-pages/man3/getpwnam.3.html) and
diff --git a/docs/_groups/USER_NAMES.md b/docs/USER_NAMES.md
index 74c24b5157..74c24b5157 100644
--- a/docs/_groups/USER_NAMES.md
+++ b/docs/USER_NAMES.md
diff --git a/docs/_groups/USER_RECORD.md b/docs/USER_RECORD.md
index b88a67e66b..f28106797e 100644
--- a/docs/_groups/USER_RECORD.md
+++ b/docs/USER_RECORD.md
@@ -15,7 +15,7 @@ pairs, encoded as JSON. Specifically:
 1. [`systemd-homed.service`](https://www.freedesktop.org/software/systemd/man/systemd-homed.service.html)
    manages `human` user home directories and embeds these JSON records
    directly in the home directory images
-   (see [Home Directories](HOME_DIRECTORY) for details).
+   (see [Home Directories](HOME_DIRECTORY.md) for details).
 
 2. [`pam_systemd`](https://www.freedesktop.org/software/systemd/man/pam_systemd.html)
    processes these JSON records for users that log in, and applies various
@@ -72,7 +72,7 @@ the following extensions are envisioned:
 4. Default parameters for backup applications and similar
 
 Similar to JSON User Records there are also
-[JSON Group Records](GROUP_RECORD) that encapsulate UNIX groups.
+[JSON Group Records](GROUP_RECORD.md) that encapsulate UNIX groups.
 
 JSON User Records are not suitable for storing all identity information about
 the user, such as binary data or large unstructured blobs of text. These parts
@@ -80,7 +80,7 @@ of a user's identity should be stored in the [Blob Directories](USER_RECORD_BLOB
 
 JSON User Records may be transferred or written to disk in various protocols
 and formats. To inquire about such records defined on the local system use the
-[User/Group Lookup API via Varlink](USER_GROUP_API). User/group records may
+[User/Group Lookup API via Varlink](USER_GROUP_API.md). User/group records may
 also be dropped in number of drop-in directories as files. See
 [`nss-systemd(8)`](https://www.freedesktop.org/software/systemd/man/nss-systemd.html)
 for details.
@@ -218,7 +218,7 @@ object. The following fields are currently defined:
 UNIX user name. This field is the only mandatory field, all others are
 optional. Corresponds with the `pw_name` field of `struct passwd` and the
 `sp_namp` field of `struct spwd` (i.e. the shadow user record stored in
-`/etc/shadow`). See [User/Group Name Syntax](USER_NAMES) for
+`/etc/shadow`). See [User/Group Name Syntax](USER_NAMES.md) for
 the (relaxed) rules the various systemd components enforce on user/group names.
 
 `realm` → The "realm" a user is defined in. This concept allows distinguishing
diff --git a/docs/_devdocs/VIRTUALIZED_TESTING.md b/docs/VIRTUALIZED_TESTING.md
index 94a56064aa..94a56064aa 100644
--- a/docs/_devdocs/VIRTUALIZED_TESTING.md
+++ b/docs/VIRTUALIZED_TESTING.md
diff --git a/docs/_devdocs/WRITING_DESKTOP_ENVIRONMENTS.md b/docs/WRITING_DESKTOP_ENVIRONMENTS.md
index b50c857051..b50c857051 100644
--- a/docs/_devdocs/WRITING_DESKTOP_ENVIRONMENTS.md
+++ b/docs/WRITING_DESKTOP_ENVIRONMENTS.md
diff --git a/docs/_devdocs/WRITING_DISPLAY_MANAGERS.md b/docs/WRITING_DISPLAY_MANAGERS.md
index efdbccc751..efdbccc751 100644
--- a/docs/_devdocs/WRITING_DISPLAY_MANAGERS.md
+++ b/docs/WRITING_DISPLAY_MANAGERS.md
diff --git a/docs/_devdocs/WRITING_NETWORK_CONFIGURATION_MANAGERS.md b/docs/WRITING_NETWORK_CONFIGURATION_MANAGERS.md
index 61b24dc759..61b24dc759 100644
--- a/docs/_devdocs/WRITING_NETWORK_CONFIGURATION_MANAGERS.md
+++ b/docs/WRITING_NETWORK_CONFIGURATION_MANAGERS.md
diff --git a/docs/_devdocs/WRITING_RESOLVER_CLIENTS.md b/docs/WRITING_RESOLVER_CLIENTS.md
index 9a08721257..9a08721257 100644
--- a/docs/_devdocs/WRITING_RESOLVER_CLIENTS.md
+++ b/docs/WRITING_RESOLVER_CLIENTS.md
diff --git a/docs/_devdocs/WRITING_VM_AND_CONTAINER_MANAGERS.md b/docs/WRITING_VM_AND_CONTAINER_MANAGERS.md
index 4d1b649df3..4d1b649df3 100644
--- a/docs/_devdocs/WRITING_VM_AND_CONTAINER_MANAGERS.md
+++ b/docs/WRITING_VM_AND_CONTAINER_MANAGERS.md
diff --git a/docs/_config.yml b/docs/_config.yml
index 3d44889f80..412db1f413 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -4,32 +4,7 @@ title: systemd
 baseurl: "" # the subpath of your site, e.g. /blog/
 url: "https://systemd.io" # the base hostname & protocol for your site
 
+permalink: /:title/
+
 # Build settings
 markdown: kramdown
-
-collections:
-  concepts:
-    title: 'Concepts'
-    output: true
-  contributing:
-    title: 'Contributing'
-    output: true
-  userdocs:
-    output: true
-    title: 'Documentation for Users and Administrators'
-  booting:
-    title: 'Booting'
-    output: true
-  interfaces:
-    title: 'Interfaces'
-    output: true
-  networking:
-    title: 'Networking'
-    output: true
-  groups:
-    title: 'Users, Groups and Home Directories'
-    output: true
-  devdocs:
-    title: 'Documentation for Developers'
-    output: true
-
diff --git a/docs/_data/extra_pages.json b/docs/_data/extra_pages.json
index 908e3a83dc..a393bb067a 100644
--- a/docs/_data/extra_pages.json
+++ b/docs/_data/extra_pages.json
@@ -1,5 +1,45 @@
 [
   {
+    "category": "Project",
+    "title": "mkosi Project - Build Bespoke OS Images",
+    "url": "https://mkosi.systemd.io/"
+  },
+  {
+    "category": "Project",
+    "title": "Brand",
+    "url": "https://brand.systemd.io/"
+  },
+  {
+    "category": "Project",
+    "title": "Mailing List",
+    "url": "https://lists.freedesktop.org/mailman/listinfo/systemd-devel"
+  },
+  {
+    "category": "Project",
+    "title": "Mastodon",
+    "url": "https://mastodon.social/@pid_eins"
+  },
+  {
+    "category": "Project",
+    "title": "Releases",
+    "url": "https://github.com/systemd/systemd/releases"
+  },
+  {
+    "category": "Project",
+    "title": "GitHub Project Page",
+    "url": "https://github.com/systemd/systemd"
+  },
+  {
+    "category": "Project",
+    "title": "Issues",
+    "url": "https://github.com/systemd/systemd/issues"
+  },
+  {
+    "category": "Project",
+    "title": "Pull Requests",
+    "url": "https://github.com/systemd/systemd/pulls"
+  },
+  {
     "category": "Manual Pages",
     "title": "Index",
     "url": "https://www.freedesktop.org/software/systemd/man/"
diff --git a/docs/_data/project.json b/docs/_data/project.json
deleted file mode 100644
index 606c784483..0000000000
--- a/docs/_data/project.json
+++ /dev/null
@@ -1,42 +0,0 @@
-[
-  {
-    "category": "Project",
-    "title": "mkosi Project - Build Bespoke OS Images",
-    "url": "https://mkosi.systemd.io/"
-  },
-  {
-    "collection": "project",
-    "title": "Brand",
-    "url": "https://brand.systemd.io/"
-  },
-  {
-    "collection": "project",
-    "title": "Mailing List",
-    "url": "https://lists.freedesktop.org/mailman/listinfo/systemd-devel"
-  },
-  {
-    "collection": "project",
-    "title": "Mastodon",
-    "url": "https://mastodon.social/@pid_eins"
-  },
-  {
-    "collection": "project",
-    "title": "Releases",
-    "url": "https://github.com/systemd/systemd/releases"
-  },
-  {
-    "collection": "project",
-    "title": "GitHub Project Page",
-    "url": "https://github.com/systemd/systemd"
-  },
-  {
-    "collection": "project",
-    "title": "Issues",
-    "url": "https://github.com/systemd/systemd/issues"
-  },
-  {
-    "collection": "project",
-    "title": "Pull Requests",
-    "url": "https://github.com/systemd/systemd/pulls"
-  }
-]
diff --git a/docs/index.md b/docs/index.md
index cd3916ca32..3c05c93550 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -12,27 +12,17 @@ systemd provides aggressive parallelization capabilities, uses socket and D-Bus
 Other parts include a logging daemon, utilities to control basic system configuration like the hostname, date, locale, maintain a list of logged-in users and running containers and virtual machines, system accounts, runtime directories and settings, and daemons to manage simple network configuration, network time synchronization, log forwarding, and name resolution.
 
 ---
-## Project
-{% for page in site.data.project %}
-* [{{ page.title }}]({{ page.url | relative_url }}){% endfor %}
-
-<!-- Collections -->
-{% for c in site.collections %}
-<!-- hide autegenerated posts collection -->
-{% if c.label != "posts" %}
-## {{ c.title }}
-{% for item in site[c.label] %}
-* [{{ item.title }}]({{ item.url | relative_url }}){% endfor %}
-{% endif %}
-{% endfor %}
 
-<!-- external pages -->
-{% assign external_pages = site.data.extra_pages | group_by:"category" %}
+{% assign by_category = site.pages | group_by:"category" %}
+{% assign extra_pages = site.data.extra_pages | group_by:"category" %}
+{% assign merged = by_category | concat: extra_pages | sort:"name" %}
 
-{% for category in external_pages %}
-## {{ category.name }}
-{% assign sorted = category.items | sort:"title" %}{% for page in sorted %}
+{% for pair in merged %}
+  {% if pair.name != "" %}
+## {{ pair.name }}
+{% assign sorted = pair.items | sort:"title" %}{% for page in sorted %}
 * [{{ page.title }}]({{ page.url | relative_url }}){% endfor %}
+  {% endif %}
 {% endfor %}
 
 ## See also