[root@localhost ~]# cat monitor.sh
#!/bin/bash

# chkconfig: 2345 08 92
# description:  The scripts is to monitor system health !

Today=`date +%Y%m%d`


function disk {

           clear

           df -h

}

function memory {

           clear

           free -m
}

function cpu {

           clear

           top

}

function process {

          clear

          process_nu=`lsof|wc -l`

          echo "The current process numbers is $process_nu" !

}

function ipaddress {

          clear

          ipaddr=`ifconfig eth0|awk ‘/inet addr/ {print $2}‘|awk -F‘:‘ ‘{print $2}‘`

          echo "This server ip address is $ipaddr" !

}

function disk_io {

         clear
   
         diskblockin=`vmstat |sed 1d|sed 1d|awk ‘{print $9}‘`

         diskblockout=`vmstat |sed 1d|sed 1d|awk ‘{print $10}‘`
   
         echo "The block equipment received $diskblockin blocks  one second !"
 
         echo "The block equipment send $diskblockout blocks one second !"


}

function current_time {

         clear

         current_time=`date|awk ‘{print $5}‘`

         echo "The current time is $current_time o clock !"

}

function users {

          clear

          current_user=`who|wc -l`

          echo "There are $current_user users login in the system !"

}

function networkcardflow  {

         clear
           
receive1=`cat /proc/net/dev|grep eth0|awk ‘{print $2}‘`


send1=`cat /proc/net/dev|grep eth0|awk   ‘{print $10}‘`


sleep 5

receive2=`cat /proc/net/dev|grep eth0|awk ‘{print $2}‘`

send2=`cat /proc/net/dev|grep eth0|awk   ‘{print $10}‘`


receive_cnt=`expr $receive2 - $receive1`

receive_cnt=`expr $receive_cnt / 40`


send_cnt=`expr $send2 - $send1`

send_cnt=`expr $send_cnt / 40`


echo "The networkcard flow Input is $receive_cnt bps per second !"


echo "The networkcard flow Ouput is $send_cnt bps per second |"

}

function menu {


         clear

         echo

         echo -e "\t\t\tSystem Admin Menu\n"

         echo -e "\t1. Display disk space"

         echo -e "\t2. Display memory usage"

         echo -e "\t3. Display cpu usage"

         echo -e "\t4. Display process statistics"

         echo -e "\t5. Display ip address"

         echo -e "\t6. Display disk io information"

         echo -e "\t7. Display current time"

         echo -e "\t8. Display current users"

         echo -e "\t9. Display networkcard flow"

         echo -e "\t0. Exit program\n\n"

         echo -en "\t\tEnter option: "

         read -n 1 option


}
   

while true

do

  menu

 case $option in

       0)
 

          break ;;

       1)
          disk ;;

       2)
         memory ;;

       3)
            
         cpu ;;

       4)

         process ;;

       5)
         ipaddress ;;

       6)

         disk_io ;;

       7)
         current_time ;;

       8)
         users ;;

       9)
         networkcardflow ;;

       *)

         clear
        
         echo "Sorry , wrong selection !"

         esac



         echo -en "\n\n\t\t\tHit any key to continue"

         read -n 1 line

 done

clear


chmod +x  monitor.sh

执行显示效果如下：

可以输入自己的选项，显示相应的结果：

比如输入 1

显示如下：

本文出自 “服务器运维” 博客，请务必保留此出处http://shamereedwine.blog.51cto.com/5476890/1911284

一个监控系统性能的脚本