-# "APT::Periodic::Unattended-Upgrade"
-# - Run the "unattended-upgrade" security upgrade script
-# every n-days (0=disabled)
-# Requires the package "unattended-upgrades" and will write
-# a log in /var/log/unattended-upgrades
-#
-# "APT::Archives::MaxAge",
+# Dir::Cache "var/cache/apt/";
+# - Set apt package cache directory
+#
+# Dir::Cache::Archives "archives/";
+# - Set package archive directory
+#
+# APT::Periodic::Enable "1";
+# - Enable the update/upgrade script (0=disable)
+#
+# APT::Periodic::BackupArchiveInterval "0";
+# - Backup after n-days if archive contents changed.(0=disable)
+#
+# APT::Periodic::BackupLevel "3";
+# - Backup level.(0=disable), 1 is invalid.
+#
+# Dir::Cache::Backup "backup/";
+# - Set periodic package backup directory
+#
+# APT::Archives::MaxAge "0"; (old, deprecated)
+# APT::Periodic::MaxAge "0"; (new)