diff --git a/README b/README
index 67a13dc..bfe0d1d 100644
--- a/README
+++ b/README
@@ -15,7 +15,14 @@ You can also get a list of domains that need to be renewed, to list the domains
 
 checkssl -l /etc/letsencrypt/live/ -e 20 -r 
 domain7.com
-domain 12.com
+domain12.com
+
+You can also get it to run a specific command if domains need renewal, for example 
+
+check -i ISPconfig -e 20 -c ~/scripts/renewssl
+
+will run the renewssl command with the domain name passed as an argument.   If there are more than one domain that needs renewal it will call the command multiple times.   This can then easily be run as a cron to regularly check and update SSL certs.
+
 
 running checkssl with no arguments gives help;
 
@@ -38,9 +45,11 @@ checkssl
   -e, --expires days
     Where 'days' is the number of days to alert if cert expires in that time period
   -r, --renew  this just lists domain names that need to be renewed.   This list could be used by an auto renew script, or to email you.
-
+  -c, --command run-command
+    Where 'run-command' is a command to be run if certificates are due for renewal. 
 
 V0.1 initial commit by SRVRCO
 v0.2 modification by MrSleeps
-v0.3 Corrected issue in grep affecting performance on some servers
+v0.3 corrected issue in grep affecting performance on some servers
 v0.4 correct typo and added -e and -r arguments
+v0.5 added --command option 
diff --git a/checkssl b/checkssl
index ea1020a..376772e 100755
--- a/checkssl
+++ b/checkssl
@@ -13,7 +13,7 @@
 # GNU General Public License at <http://www.gnu.org/licenses/> for
 # more details.
 
-# Usage: checkssl [-h|--help] [-d|--debug] [-f|--file filename] [-s|--server stype] [-l|--location] [-e:--expires days] [-r:--renew]
+# Usage: checkssl [-h|--help] [-d|--debug] [-f|--file filename] [-s|--server stype] [-l|--location] [-e:--expires days] [-r:--renew] [-c:--command command]
 
 # Revision history:
 # 2015-12-05 Created (v0.1)
@@ -22,6 +22,7 @@
 # 2015-12-06 corrected typo (srvrco)
 # 2015-12-06 Added --expires days argument to set the timescale you want to know about certs coming to end of life (srvrco)
 # 2015-12-06 Added --renew argument to list domains ready for renew v0.4 - srvrco)
+# 2015-12-19 Added --command argument to perform action to renew certs ( or send email or anything else needed)
 # ---------------------------------------------------------------------------
 
 PROGNAME=${0##*/}
@@ -58,7 +59,7 @@ signal_exit() { # Handle trapped signals
 }
 
 usage() {
-  echo -e "Usage: $PROGNAME [-h|--help] [-d|--debug] [-f|--file filename] [-s|--server stype] [-l|--location directory] [-e|--expires days] [-r:--renew]"
+  echo -e "Usage: $PROGNAME [-h|--help] [-d|--debug] [-f|--file filename] [-s|--server stype] [-l|--location directory] [-e|--expires days] [-r:--renew] [-c:--command command]"
 }
 
 log() {
@@ -91,6 +92,8 @@ help_message() {
   -e, --expires days
     Where 'days' is the number of days to alert if cert expires in that time period
   -r, --renew  this just lists domain names that need to be renewed.   This list could be used by an auto renew script, or to email you.
+  -c, --command run_command
+    Where 'run_command' is a command which will be run ( with domain name passed) for any certs due for renewal
 
 _EOF_
   return
@@ -109,6 +112,8 @@ while [[ -n $1 ]]; do
       help_message; graceful_exit ;;
     -d | --debug)
      _USE_DEBUG=1 ;;
+    -c | --command)
+      COMMANDARG=true; shift; RUNCOMMAND="$1" ;;
     -e | --expires)
       shift; RENEW_ALERT="$1" ;;
     -f | --file)
@@ -208,6 +213,10 @@ done
 
 if [[ $RENEWARG ]]; then
   grep "certificate near renewal date" $DATA_OUT | awk -F"|" '{print $1}'
+elif [[ $COMMANDARG ]]; then
+  for DOMAIN in $(grep "certificate near renewal date" $DATA_OUT | awk -F"|" '{print $1}'); do
+    $RUNCOMMAND $DOMAIN
+  done
 else
   echo ""
   cat $DATA_OUT | column -t -s"|"