dnf-versionlock: add page (#18703)

pages/linux/dnf-versionlock.md

@@ -0,0 +1,26 @@
+# dnf versionlock
+
+> Protect packages from updates to newer versions.
+> Not default to `dnf` but supported via `dnf-plugins-core`.
+> See also: `dnf`.
+> More information: <https://dnf-plugins-core.readthedocs.io/en/latest/versionlock.html>.
+
+- List the current versionlock entries:
+
+`dnf versionlock`
+
+- Add a versionlock for all available packages matching the spec:
+
+`dnf versionlock add {{package}}`
+
+- Add an exclude (within versionlock) for the available packages matching the spec:
+
+`dnf versionlock exclude {{package}}`
+
+- Remove any matching versionlock entries:
+
+`dnf versionlock delete {{package}}`
+
+- Remove all versionlock entries:
+
+`dnf versionlock clear`