some os resource monitor function

monitor.sh

#!/usr/bin/env bash

function GetPID #User #Name
 {
 PsUser=$1
 PsName=$2
 pid=`ps -u $PsUser|grep $PsName|grep -v grep|grep -v vi|grep -v dbx \
 |grep -v tail|grep -v start|grep -v stop |sed -n 1p |awk '{print $1}'`
 echo $pid
 }

function GetCpu
{
  CpuValue=`ps -p $1 -o pcpu |grep -v CPU | awk '{print $1}' | awk -F. '{print $1}'`
  echo $CpuValue
}

function CheckCpu
{
  local PID=$1
  local THRESHOLD=$2
  cpu=`GetCpu $PID`
  if [ $cpu -gt $THRESHOLD ]; then
   echo "The usage of cpu is larger than ${THRESHOLD}%"
  else
   echo "The usage of cpu is normal"
  fi
}


function GetMem
{
  MEMUsage=`ps -o vsz -p $1|grep -v VSZ`
  (( MEMUsage /= 1000))
  echo $MEMUsage
}

function CheckMem
{
  local PID=$1
  local THRESHOLD=$2
  mem=`GetMem $PID`
  if [ $mem -gt $THRESHOLD ]; then
    echo “The usage of memory is larger than ${THRESHOLD}M”
  else
    echo “The usage of memory is normal”
  fi
}

function GetDes
{
   DES=`ls /proc/$1/fd | wc -l`
   echo $DES
}

function CheckDes
{
  local PID=$1
  local THRESHOLD=$2
  des=`GetDes $PID`
  if [ $des -gt $THRESHOLD ]; then
    echo "The number of des is larger than $THRESHOLD"
  else
    echo "The number of des is normal"
  fi
}

function Listening
{
  Listeningnum=`ss -anl | grep ":$1 " | wc -l`
  if [ $Listeningnum == 0 ]; then
    echo "0"
  else
    echo "1"
  fi
}

function CheckPort
{
  local PORT=$1
  isListen=`Listening $PORT`
  if [ $isListen -eq 1 ]; then
    echo "The port is listening"
  else
    echo "The port is not listening"
  fi
}

function GetSysCPU
{
  CpuIdle=`vmstat 1 5 |sed -n '3,$p' \
  |awk '{x = x + $15} END {print x/5}' |awk -F. '{print $1}'`
  CpuNum=`echo "100-$CpuIdle" | bc`
  echo $CpuNum
}

function CheckSysCPU
{
  local THRESHOLD=$1
  cpu=`GetSysCPU`
  echo "The system CPU is $cpu"
  if [ $cpu -gt ${THRESHOLD} ];then
    echo "The usage of system cpu is larger than ${THRESHOLD}%"
  else
    echo "The usage of system cpu is normal"
  fi
}

function GetDiskSpc
{
  if [ $# -ne 1 ]; then
    return 1
  fi
  Folder="$1$"
  DiskSpace=`df -k |grep $Folder |awk '{print $5}' |awk -F% '{print $1}'`
  echo $DiskSpace
}

function CheckDiskSpc
{
  local Mount=$1
  local THRESHOLD=$2
  DiskSpace=`GetDiskSpc $Mount`
  echo "The system $Mount disk space is $DiskSpace%"
  if [ $DiskSpace -gt $THRESHOLD ]; then
    echo "The usage of system disk($Mount) is larger than ${THRESHOLD}%"
  else
    echo "The usage of system disk($Mount) is normal"
  fi
}