diff --git a/example.com.cron-task.sh b/example.com.cron-task.sh
index 0f0e1cd..7777a3e 100755
--- a/example.com.cron-task.sh
+++ b/example.com.cron-task.sh
@@ -3,10 +3,7 @@
 set -e
 
 ./generate-and-sign-cert.sh \
-  "acmeclient" \
   "/etc/nginx/certs/example.com" \
   "/CN=example.com" \
   "subjectAltName=DNS:example.com,DNS:www.example.com" \
   &>> "/var/log/acmeclient/example.com.log"
-
-service nginx reload
diff --git a/generate-and-sign-cert.sh b/generate-and-sign-cert.sh
index d79c563..88e76de 100755
--- a/generate-and-sign-cert.sh
+++ b/generate-and-sign-cert.sh
@@ -2,25 +2,34 @@
 
 set -e
 
-ACMEUSER="$1"
-CERTS_DIR="$2"
-SUBJ="$3"
-EXT="$4"
+ACMEUSER="bw"
+WWWGROUP="www-data"
 
-if [ -z "$ACMEUSER" ] || [ -z "$CERTS_DIR" ] || [ -z "$SUBJ" ]; then
+CERTS_DIR="$1"
+SUBJ="$2"
+EXT="$3"
+
+if [ -z "$CERTS_DIR" ] || [ -z "$SUBJ" ]; then
   echo "Usage:"
   echo "$0 \\"
-  echo "    acmeuser \\"
   echo "    /mysite/certs/dir/ \\"
   echo "    /CN=mysite.com \\"
   echo "    subjectAltName=DNS:mysite.com,DNS:www.mysite.com"
   exit 0
 fi
 
+
 BASE_DIR=$(cd `dirname "$0"`; pwd)
 NAME=`date +%Y-%m-%d--%H-%M-%S--%N`
 PREFIX="$CERTS_DIR/$NAME"
 
+if openssl x509 -checkend 864000 -noout -in "$CERTS_DIR/public.crt"; then
+  echo " -------------------------------------------- "
+  echo " certifiate is actual now ($NAME) "
+  echo " -------------------------------------------- "
+  exit 0
+fi
+
 echo " -------------------------------------------- "
 echo " begin $PREFIX "
 echo " -------------------------------------------- "
@@ -35,17 +44,25 @@ openssl req -newkey rsa:4096 -sha512 -nodes \
 sudo -u "$ACMEUSER" "$BASE_DIR/sign-cert.py" "$PREFIX.csr" "$PREFIX.crt"
 
 echo "compare modulus"
-MUDULUS_CRT=`openssl x509 -noout -modulus -in "$PREFIX.csr"`
-MUDULUS_KEY=`openssl rsa -noout -modulus -in "$PREFIX.key"`
-if [ "$MODULUS_CRT" != "$MUDULUS_KEY" ]; then
+MODULUS_CRT=`openssl x509 -noout -modulus -in "$PREFIX.crt"`
+MODULUS_KEY=`openssl rsa -noout -modulus -in "$PREFIX.key"`
+if [ "$MODULUS_CRT" != "$MODULUS_KEY" ]; then
   echo "ERROR: modulus of certificate do not matches modulus of key"
   exit 1
 fi
 echo "ok"
 
+echo "verify certificate"
+openssl verify -CAfile "$PREFIX.crt" "$PREFIX.crt"
+
+echo "update symlinks"
+chown :$WWWGROUP "$PREFIX.key"
+chmod g+r "$PREFIX.key"
 cd "$CERTS_DIR"
-ln -fs "$PREFIX.key" "private.key"
-ln -fs "$PREFIX.key" "public.crt"
+ln -fs "$NAME.key" "private.key"
+ln -fs "$NAME.crt" "public.crt"
+
+service nginx reload
 
 echo " -------------------------------------------- "
 echo " done $PREFIX "
diff --git a/sign-cert.py b/sign-cert.py
index c9dc8ca..afe5772 100755
--- a/sign-cert.py
+++ b/sign-cert.py
@@ -12,6 +12,7 @@ from jwcrypto.common import base64url_encode
 
 
 api_url             = 'https://acme-staging-v02.api.letsencrypt.org/directory'
+#api_url             = 'https://acme-v02.api.letsencrypt.org/directory'
 api_client_key_file = '/home/bw/work/dev/acmeclient-data/api-client-key.json'
 answers_prefix      = '/var/www/html/.well-known/acme-challenge/'