Ping to determine the monitoring host's survival

The ping command to monitor whether the host is alive, as long as a ping is normal, if the ping fails to continue to ping, three times it is considered a host outage or network problems, then you can send email alerts.

Method One:

Note: If the number of machines judged is not many, can ping three times per machine judge

#! /bin/bash

if [-e/tmp/c.txt];then

Rm-rf/tmp/c.txt

Touch/tmp/c.txt

Else

Touch/tmp/c.txt

Fi

if [-e/tmp/d.txt];then

Rm-rf/tmp/d.txt

Touch/tmp/d.txt

Else

Touch/tmp/d.txt

Fi

For i in ' SEQ 100 105 '

Do

ip=192.168.2. $i

Ping-c 3 $ip >/dev/null 2>&1

If [$?-eq 0];then

Echo $ip "is in line" >>/tmp/c.txt

Else

Echo $ip "is offline" >>/tmp/d.txt

Fi

Done

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Method Two:

Description: Put the number of errors in the Fail_count variable to determine that the non-ping failed three times

#! /bin/bash

if [-e/tmp/c.txt];then

Rm-rf/tmp/c.txt

Touch/tmp/c.txt

Else

Touch/tmp/c.txt

Fi

if [-e/tmp/d.txt];then

Rm-rf/tmp/d.txt

Touch/tmp/d.txt

Else

Touch/tmp/d.txt

Fi

For i in ' SEQ 100 105 '

Do

ip=192.168.2. $i

Fail_count=0

For ((i=1;i<=3;i++))

Do

If ping-c 1 $ip >/dev/null;then

echo "$ip is online" >>/tmp/c.txt

Break

Else

#echo "$ip ping is offline $i"

Let fail_count++

Fi

Done

If [$fail _count-eq 3];then

echo "$ip is offline" >>/tmp/d.txt

Fi

Done

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Method Three:

Description: Put the error IP into the array to determine if the ping failed three times

#! /bin/bash

if [-e/tmp/c.txt];then

Rm-rf/tmp/c.txt

Touch/tmp/c.txt

Else

Touch/tmp/c.txt

Fi

if [-e/tmp/d.txt];then

Rm-rf/tmp/d.txt

Touch/tmp/d.txt

Else

Touch/tmp/d.txt

Fi

For i in ' SEQ 100 105 '

Do

ip=192.168.2. $i

Num=1

While [$num-le 3]

Do

If ping-c 1 $ip >/dev/null;then

echo "$ip is online" >>/tmp/c.txt

Break

Else

# echo "$ip ping is offline $num"

fail_count[$num]= $ip

Let num++

Fi

Done

if [${#fail_count [*]}-EQ 3];then

echo "${fail_count[1]} is offline" >>/tmp/d.txt

Fi

Done

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Method Four:

Description: Use for loop, because continue, if Ping is out of the loop, the ping fails if you do not jump out

#! /bin/bash

if [-e/tmp/c.txt];then

Rm-rf/tmp/c.txt

Touch/tmp/c.txt

Else

Touch/tmp/c.txt

Fi

if [-e/tmp/d.txt];then

Rm-rf/tmp/d.txt

Touch/tmp/d.txt

Else

Touch/tmp/d.txt

Fi

Ping_success_status () {

If ping-c 1 $ip >/dev/null;then

echo "$ip is online" >>/tmp/c.txt

Continue

Fi

}

For i in ' SEQ 100 105 '

Do

ip=192.168.2. $i

Ping_success_status

Ping_success_status

Ping_success_status

echo "$ip is offline" >>/tmp/d.txt

Done

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Here's a little bit different from the picture above:

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Ifconfig |awk-f [: A-Z "" "]+ ' Nr==2{print $ $} ' can get an IP address

This article refers to the article:

1. http://lizhenliang.blog.51cto.com/7876557/1736770

2. http://blog.csdn.net/zhuying_linux/article/details/6822987

3. http://12100846.blog.51cto.com/12090846/1863259
   

Ping to determine the monitoring host's survival