I believe something as simple, as this would do: From ce28f12b7682fc5750fe225ac563cacfdcf81ff0 Mon Sep 17 00:00:00 2001 From: Dmitry Bogatov <kact...@debian.org> Date: Sat, 9 Mar 2019 20:48:07 +0000 Subject: [PATCH] Document NETDOWN variable in /etc/default/halt
---
debian/src/initscripts/etc/default/halt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/debian/src/initscripts/etc/default/halt
b/debian/src/initscripts/etc/default/halt
index 21bc1198..596b829e 100644
--- a/debian/src/initscripts/etc/default/halt
+++ b/debian/src/initscripts/etc/default/halt
@@ -1,2 +1,5 @@
# Default behaviour of shutdown -h / halt. Set to "halt" or "poweroff".
HALT=poweroff
+
+# Bring networking down before halting/rebooting system. Set to "yes" or "no".
+NETDOWN=yes
--
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