diff --git a/server/back-cfg.sh b/server/back-cfg.sh
index da0e459..8d07ac5 100755
--- a/server/back-cfg.sh
+++ b/server/back-cfg.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 
-# echo "0 11 * * * root /root/scripts/server/back-cfg.sh" > /etc/cron.d/back-cfg
+if [ ! -e /etc/cron.d/back-cfg ]; then
+  echo "0 11 * * * root /root/scripts/server/back-cfg.sh" > /etc/cron.d/back-cfg
+fi
 
 BAKDIR=/root/backup/cfg
 
diff --git a/server/back-web.sh b/server/back-web.sh
index 9ddb07f..145b27a 100644
--- a/server/back-web.sh
+++ b/server/back-web.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 
-# echo "0 14 * * * root /root/scripts/server/back-web.sh" > /etc/cron.d/back-web
+if [ ! -e /etc/cron.d/back-web ]; then
+  echo "0 14 * * * root /root/scripts/server/back-web.sh" > /etc/cron.d/back-web
+fi
 
 BAKDIR=/root/backup/web
 DATE=$(date +%y%m%d-%H%M)