I had to modify the code on CentOS 7

MONTH=$(date +%b)
DAY=$(date +%e)
#HOUR_AGO=`TZ=GMT+4 date “+%H:%M:%S”`
HOUR_AGO=`date -d ‘1 hour ago’ “+%H:%M:%S”`
HAS_FAILED_LAST_HOUR=`sudo grep “$MONTH” /var/log/secure | grep “$DAY” | grep “Failed password” | awk -v h=”$HOUR_AGO”‘BEGIN{c = 0;}{if($3 > h) c = c + 1;}END{print c;}’`
if [ $HAS_FAILED_LAST_HOUR -eq 0 ]; then
FINAL_STATUS=”OK – No failed logins in last hour|failed=0″
RETURN_STATUS=$STATE_OK
else
RECENT_ATTEMPTS=`sudo grep “$MONTH” /var/log/secure | grep “$DAY” | grep “Failed password” | awk -v h=”$HOUR_AGO”
‘{if($3 > h) for(i=1;i