Add tripwire check as a cron job

src/freedombone-base-tripwire

     echo 'EMAILREPORTLEVEL =3' >> /etc/tripwire/twcfg.txt
     echo 'REPORTLEVEL   =3' >> /etc/tripwire/twcfg.txt
     echo 'SYSLOGREPORTING =false' >> /etc/tripwire/twcfg.txt
-    echo 'MAILMETHOD    =SMTP' >> /etc/tripwire/twcfg.txt
+    echo 'MAILMETHOD    =SENDMAIL' >> /etc/tripwire/twcfg.txt
     echo 'SMTPHOST      =localhost' >> /etc/tripwire/twcfg.txt
     echo 'SMTPPORT      =25' >> /etc/tripwire/twcfg.txt
     echo 'TEMPDIRECTORY =/tmp' >> /etc/tripwire/twcfg.txt
+    echo 'MAILFROMADDRESS =tripwire@$(HOSTNAME)' >> /etc/tripwire/twcfg.txt
 
     echo '
 
     sed -i 's|$(TWETC)/tw.pol.*||g' /etc/tripwire/twpol.txt
     # site key name
     sed -i 's|$(TWETC)/site.key|$(TWETC)/$(HOSTNAME)-site.key|g' /etc/tripwire/twpol.txt
+
     # create the policy
     echo '
 
 
        ' | reset-tripwire
 
+    TRIPWIRE_MIN=$((1 + RANDOM % 49))
+    TRIPWIRE_HOUR=$((1 + RANDOM % 6))
+    echo "${TRIPWIRE_MIN} ${TRIPWIRE_HOUR}              *   *   *   root /usr/sbin/tripwire -m c" /etc/crontab
+
     mark_completed $FUNCNAME
 }