bash- script that detects high CPU and runs a "system scan"

blackbox.sh

#!/bin/bash
INTERVAL=$1
THRESHOLD=$2

if [ "" == "$INTERVAL" -o "" == "$THRESHOLD" ]; then
  echo "You must insert interval and cpu threshold"
  exit 1
fi

while [ 1 ]; do
  VM_STAT=`vmstat 1 2`
  VM_CURR_VALUE=`echo "$VM_STAT" | tail -n 1`
  CPU_IDLE=`echo "$VM_CURR_VALUE" | awk {'print $15'}`
  CPU_USE=$((100-$CPU_IDLE))
  if [ $CPU_USE -ge $THRESHOLD ]; then
    LOG_DIR=$HOSTNAME-`date +"%Y%m%d_%H%M%S"`
    mkdir -p $LOG_DIR
    df -h >$LOG_DIR/df 2>&1 &
    free -m >$LOG_DIR/free 2>&1 &
    w >$LOG_DIR/w 2>&1 &
    echo "$VM_STAT" >$LOG_DIR/vmstat 2>&1 &
    netstat -tpan >$LOG_DIR/netstat 2>&1 &
    ps -fea >$LOG_DIR/ps 2>&1 &
    top -n 1 -b -c >$LOG_DIR/top 2>&1 &
    /usr/sbin/lsof >$LOG_DIR/lsof 2>&1 &
    iostat -xn >$LOG_DIR/iostat 2>&1 &
    mpstat -P ALL >$LOG_DIR/mpstat 2>&1 &
    hdparm -t /dev/xvda5 >$LOG_DIR/hdparm 2>&1 &
    
    #RESIN_ONLY
    if [ -d /data1/resin ]; then
      echo >/data1/resin/log/jvm.log
      RESIN_PID=`ps -fea | grep com.caucho.server.resin.Resin | grep -v perl | grep -v grep | awk {'print $2'}`
      kill -3 $RESIN_PID
      sleep 2
      cp /data1/resin/log/jvm.log $LOG_DIR/jvm.log
    fi
    sleep 60
  fi
  sleep $INTERVAL
done