diff --git a/shell/debian.sh b/shell/debian.sh
index e4085df..f806ba6 100644
--- a/shell/debian.sh
+++ b/shell/debian.sh
@@ -8,6 +8,20 @@ apt_clean() {
 		clean
 }
 
+apt_conf_write() {
+	printf "\
+Acquire::AllowInsecureRepositories False;
+Acquire::AllowWeakRepositories False;
+Acquire::AllowDowngradeToInsecureRepositories False;
+Acquire::Check-Valid-Until True;
+APT::Install-Recommends False;
+APT::Install-Suggests False;
+APT::Get::Show-Versions True;
+Dir::Etc::SourceParts \"\";
+Dpkg::Progress True;
+" >"/etc/apt/apt.conf.d/apt.conf"
+}
+
 apt_install_backports() {
 	apt_install_target "${DEBIAN_CODENAME}-backports" "${@}"
 }
diff --git a/shell/rescue/common.sh b/shell/rescue/common.sh
index 306f7fa..49a9305 100644
--- a/shell/rescue/common.sh
+++ b/shell/rescue/common.sh
@@ -1,17 +1,7 @@
 rescue_configure() {
 	local hostname="${1}"
 	# apt / conf
-	printf "\
-Acquire::AllowInsecureRepositories False;
-Acquire::AllowWeakRepositories False;
-Acquire::AllowDowngradeToInsecureRepositories False;
-Acquire::Check-Valid-Until True;
-APT::Install-Recommends False;
-APT::Install-Suggests False;
-APT::Get::Show-Versions True;
-Dir::Etc::SourceParts \"\";
-Dpkg::Progress True;
-" >"/etc/apt/apt.conf.d/apt.conf"
+	apt_conf_write
 	# apt / sources
 	apt_sources_write
 	# bash / rc