使用shell编写一个检测系统参数的脚本

检测os的脚本

目的：学了shell语言后，根据已学编写一个shell的脚本实现检测部分系统参数实现邮件告警，

（之前刚刚学习写的不怎么完善和实用！）

[root@cml scripts]# cat os.monitor.sh

#!/bin/bash

###########

#name=linux查看系统资源脚本

#auth=cml

#time:2015

###########

DATE=`date "+%F %H:%M:%S"`

HOST=`hostname`

###########

echo "check:$DATE"

check_yum(){

yum install -y sysstat

yum install -y iftop

yum install -y lsof

}

check_mail(){

rpm -qa | grep mailx-12.4-8.el6_6.x86_64

mail=`echo $?`

if [ $mail -eq 0 ]; then

echo "mail is installed"

else

yum install -y mailx

fi

service postfix status

mail=`echo $?`

if [ $mail -eq 0 ]; then

echo "postfix is running!"

else

echo "postfix not running"

service postfix start

echo "postfix successfully runnig"

fi

echo -e "33[32m=========check_mail is ok========33[0m"

##只是为了好看分隔

}

check_sys(){

# echo "检查主机名，系统参数！"

echo -n "HOSTNAME:"

echo $HOST

echo -n "系统版本："

cat /etc/issue

echo -n "系统的参数："

cat /proc/version

echo -e "33[32m=========check_sys is ok========33[0m"

}

check_CPU(){

# echo "检查CPU,LOAD,WA,IDEL情况！"

echo -n "CPU内核:"

cpu=`cat /proc/cpuinfo | grep processor | wc -l`

echo $cpu

echo -n "load:"

load1=`w | awk 'NR==1 {print $10}' | awk -F '.' '{print $1}'`

load2=w | awk 'NR==1 {print $10}'

echo $load2

if [ $load1 -lt $cpu ]; then

echo "send_mail to ********@qq.com"

echo "your cpu is normal! cpu=$cpu load balance=$load2 time:$DATE" | mail -s "check your CPU" ********@qq.com

else

echo "your load<cpu load=$load cpu=$cpu $DATE"

fi

echo -e "33[32m=========check_CPU is ok========33[0m"

}

check_mem(){

# echo "检查内存使用情况！"

free=`free -m | awk 'NR==2 {print $4}'`

cache=`free -m | awk 'NR==2 {print $7}'`

echo -n "内存使用情况："

mem=`echo $[free+cache]`

echo $mem

if [ $mem -lt 1000 ]; then

echo "send_mail to ********@qq.com"

echo "your mem is normal time:$DATE" | mail -s "check your mem " ********@qq.com

else

echo "your mem:$mem>1000 is abnormality time:$DATE"

fi

echo -e "33[32m=========check_mem is ok========33[0m"

}

check_network(){

# echo "检查网卡eth0的流量！"

# iftop -t >> /tmp/network

echo -n "接收端流量："

# cat /tmp/network | grep send | awk 'NR==1 {print $4}'

ifconfig eth0 | awk 'NR==8 {print $3}' | awk -F '(' '{print $2}'

echo -n "发送端流量："

# cat /tmp/network | grep receive | awk 'NR==1 {print $4}'

ifconfig eth0 | awk 'NR==8 {print $7}' | awk -F '(' '{print $2}'

echo -e "33[32m=========check_network is ok========33[0m"

}

check_TCP(){

# echo "检查TCP连接状态！"

echo -n "TCP连接状态："

netstat -an | awk '/^tcp/{a[$NF]++}END{for (i in a)print i,a[i]}'

listen=`netstat -an | awk '/^tcp/{a[$NF]++}END{for (i in a)print i,a[i]}' | awk 'NR==2 {print $2}'`

if [ $listen -gt 7 ]; then

echo "send_mail to ********@qq.com "

echo "your connection is normal! time:$DATE" | mail -s "check your TCP " ********@qq.com

else

echo "your now-listen>Normal-listen now-listen=$listen $DATE"

fi

echo -e "33[32m=========check_TCP is ok========33[0m"

}

check_DISK(){

# echo "检查磁盘的使用情况！"

echo "/分区的使用百分比："

root=`df -h | awk 'NR==3{print $4}' | awk -F "%" '{print $1}'`

echo $root

echo "INNODE使用百分比："

df -i | awk 'NR==3 {print $4}'

if [ $root -lt 80 ]; then

echo "send_mail to ********@qq.com"

echo "your disk:/ is normal! time:$DATE " | mail -s "check your DISK" ********@qq.com

else

echo "your disk:/ greater than 80% /:$root time:$DATE"

fi

echo -e "33[32m=========check_DISK is ok========33[0m"

}

monitor2(){

check_sys

check_CPU

check_mem

check_network

check_TCP

check_DISK

}

monitor2 >> /tmp/$(hostname).txt

（编辑：李大同）

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