Using the shell to write a script that detects system parameters

Script to detect OS

Objective: After learning the shell language, according to the script that has been learned to write a shell to detect some of the system parameters to achieve email alerts,

(I have just learned to write less perfect and practical!) ）

[email protected] scripts]# cat os.monitor.sh

#!/bin/bash

###########

#name =linux View System resource Scripts

#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 "\033[32m=========check_mail is ok========\033[0m"

# #只是为了好看分隔

}

Check_sys () {

# echo "Check host name, System parameters! "

Echo-n "HOSTNAME:"

Echo $HOST

Echo-n "System version:"

Cat/etc/issue

Echo-n "System parameters:"

Cat/proc/version

Echo-e "\033[32m=========check_sys is ok========\033[0m"

}

Check_cpu () {

# echo "Check Cpu,load,wa,idel situation! "

Echo-n "CPU Core:"

cpu= ' Cat/proc/cpuinfo | grep Processor | Wc-l '

Echo $CPU

Echo-n "Load:"

Load1= ' W | awk ' nr==1 {print $} ' | Awk-f '. ' ' {print '} '

Load2=w | awk ' nr==1 {print $} '

Echo $load 2

If [$load 1-lt $cpu]; Then

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

echo "Your CPU is normal! cpu= $cpu load balance= $load 2 time: $DATE "| Mail-s "Check your CPU" ******** @qq. com

Else

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

Fi

Echo-e "\033[32m=========check_cpu is ok========\033[0m"

}

Check_mem () {

# echo "Check memory usage! "

Free= ' Free-m | awk ' nr==2 {print $4} '

Cache= ' Free-m | awk ' nr==2 {print $7} '

Echo-n "Memory Usage:"

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 "\033[32m=========check_mem is ok========\033[0m"

}

Check_network () {

# echo "Check the network card eth0 traffic! "

# iftop-t >>/tmp/network

Echo-n "Receive-side traffic:"

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

Ifconfig eth0 | awk ' nr==8 {print $} ' | Awk-f ' (' {print $} '

Echo-n "Send-side traffic:"

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

Ifconfig eth0 | awk ' nr==8 {print $7} ' | Awk-f ' (' {print $} '

Echo-e "\033[32m=========check_network is ok========\033[0m"

}

Check_tcp () {

# echo "Check TCP connection Status! "

Echo-n "TCP Connection Status:"

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 $} '

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 "\033[32m=========check_tcp is ok========\033[0m"

}

Check_disk () {

# echo "Check the disk usage! "

echo "/partition percent used:"

root= ' Df-h | awk ' Nr==3{print $4} ' | Awk-f "%" ' {print '} '

Echo $root

echo "Innode Use percent:"

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 "\033[32m=========check_disk is ok========\033[0m"

}

Monitor2 () {

Check_sys

Check_cpu

Check_mem

Check_network

Check_tcp

Check_disk

}

Monitor2 >>/tmp/$ (hostname). txt

This article is from the "Road to be Operational" blog, please be sure to keep this source http://legehappy.blog.51cto.com/13251607/1962803

Using the shell to write a script that detects system parameters