[Doc] Using cron

README

@@ -50,7 +50,27 @@ Start reed-alert
 To start reed-alert
 
 + sbcl : **sbcl --script config_file.lisp**
-+ ecl  : **ecl -shell config_file.lisp**
++ ecl  : **ecl --shell config_file.lisp**
+
+Older versions of ecl requires -shell instead of --shell.
+
+
+Reed-alert start automation
+---------------------------
+
+You can use cron to start reed-alert every n minutes (or whatever time
+range you want). The frequency depend on what you check, if you only
+want to check the daily backup worked, running reed-alert once a day
+is fine but if you need to monitor a critical service then every
+minute seems more adapted.
+
+As always with cron jobs, be sure that either you call the interpreter
+using its full path or that $PATH inside the crontab contains it.
+
+A cron job every minute using ecl would looks like this :
+
+    */5 * * * * ( cd /opt/reed-alert/ && /usr/local/bin/ecl --shell server.lisp )
+
 
 Personal Configuration File
 ---------------------------