diff --git a/.github/labeler.yml b/.github/labeler.yml
index 773d575004..7d128f42d6 100644
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 hwdb:
   - hwdb.d/**/*
 units:
diff --git a/.github/workflows/build_test.sh b/.github/workflows/build_test.sh
index 57df14e2fc..89d2f85cfb 100755
--- a/.github/workflows/build_test.sh
+++ b/.github/workflows/build_test.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 set -ex
 
diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 3bb0cbddb2..763a9b8025 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: Build test
 on:
diff --git a/.github/workflows/cifuzz.yml b/.github/workflows/cifuzz.yml
index 14d81a67ff..562f296399 100644
--- a/.github/workflows/cifuzz.yml
+++ b/.github/workflows/cifuzz.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # See: https://google.github.io/oss-fuzz/getting-started/continuous-integration/
 
 name: CIFuzz
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index a0eb0f01fd..7581335a49 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: Coverity
 
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
index 0a1df92264..aad5d2157f 100644
--- a/.github/workflows/labeler.yml
+++ b/.github/workflows/labeler.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: "Pull Request Labeler"
 
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index f4e7f18d52..1136c0523b 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # https://github.com/marketplace/actions/super-linter
 name: Lint Code Base
 
diff --git a/.github/workflows/mkosi.yml b/.github/workflows/mkosi.yml
index 5df3b60c99..9ae40e316f 100644
--- a/.github/workflows/mkosi.yml
+++ b/.github/workflows/mkosi.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # Simple boot tests that build and boot the mkosi images generated by the mkosi config files in mkosi.default.d/.
 name: mkosi
 
diff --git a/.github/workflows/unit_tests.sh b/.github/workflows/unit_tests.sh
index bc5050fd1c..e1f7a4be1e 100755
--- a/.github/workflows/unit_tests.sh
+++ b/.github/workflows/unit_tests.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # shellcheck disable=SC2206
 PHASES=(${@:-SETUP RUN RUN_ASAN_UBSAN CLEANUP})
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 9055716ef2..e697e6485d 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: Unit tests
 on:
diff --git a/.semaphore/semaphore-runner.sh b/.semaphore/semaphore-runner.sh
index a0a4153cde..381504fd3b 100755
--- a/.semaphore/semaphore-runner.sh
+++ b/.semaphore/semaphore-runner.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 set -eux
 set -o pipefail
diff --git a/.semaphore/semaphore.yml b/.semaphore/semaphore.yml
index 06f162007e..bd5d135e9e 100644
--- a/.semaphore/semaphore.yml
+++ b/.semaphore/semaphore.yml
@@ -1,4 +1,5 @@
 ---
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # vi: ts=2 sw=2 et:
 
 version: v1.0
diff --git a/coccinelle/run-coccinelle.sh b/coccinelle/run-coccinelle.sh
index e7a6d51f49..becb38bf91 100755
--- a/coccinelle/run-coccinelle.sh
+++ b/coccinelle/run-coccinelle.sh
@@ -1,4 +1,5 @@
 #!/bin/bash -e
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # Exclude following paths from the Coccinelle transformations
 EXCLUDED_PATHS=(