diff --git a/cd.sh b/cd.sh
index 7c8fb21..0869fa7 100644
--- a/cd.sh
+++ b/cd.sh
@@ -174,7 +174,6 @@ local text=""
         text="${text}nameserver ${server}
 "
     done
-    cd_cat "${CD_DNS_FILE}"
     cd_write "${CD_DNS_FILE}" "${text}"
 }
 
@@ -192,7 +191,8 @@ local file
             cd_cat "${file}"
         ;;
         "${CD_OS_DEBIAN}")
-            cd_write "/etc/apt/sources.list" "\
+            file="/etc/apt/sources.list"
+            cd_write "${file}" "\
 deb ${CD_OS_REPO} ${CD_OS_VERSION} main
 deb ${CD_OS_REPO} ${CD_OS_VERSION}-backports main
 deb ${CD_OS_REPO} ${CD_OS_VERSION}-updates main
@@ -444,6 +444,7 @@ cd_write () {
 local file="${1}"
 local text="${2}"
     if [ "${file}" ] ; then
+        [ -f "${file}" ] && cd_cat "${file}"
         echo "→ ${1}"
         echo -n "${text}" > "${file}" || exit
         cd_cat "${file}"