locale: add page (#7328)

pages/linux/locale.md

@@ -0,0 +1,20 @@
+# locale
+
+> Get locale-specific information.
+> More information: <https://manned.org/locale>.
+
+- List all global environment variables describing the user's locale:
+
+`locale`
+
+- List all available locales:
+
+`locale --all-locales`
+
+- Display all available locales and the associated metadata:
+
+`locale --all-locales --verbose`
+
+- Display the current date format:
+
+`locale date_fmt`