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This article mainly introduces "how to write a Shell script to detect the smooth flow of a certain ip network". In the daily operation, I believe that many people have doubts about how to write a Shell script to detect the smooth flow of a certain ip network. I have consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts of "how to write a Shell script to detect the smooth flow of a certain ip network". Next, please follow the editor to study!

The code is as follows:

#! / bin/bash

#

# the script is placed on a different machine. Use the scheduled task to check whether the network of 192.168.10.231 is unblocked, and send SMS alarm if it is not available.

# to prevent frequent receipt of SMS messages, the following restrictions are imposed on sending SMS messages:

# only send the first three alarm messages in an hour, that is, if the network is not available, only the first three messages will be sent in an hour.

# this script can only detect whether one ip is disconnected. You can add a loop at the beginning to detect multiple ip

#

# initialize environment variables

Source / root/.bash_profile

# mailing list

Mail_list='135xxxxxxxx@139.com,zhangwz@xx.net'

# ip detected by ping three times

Ping= `ping-c 3 192.168.1.69 | awk 'NR==7 {print $4}' `

# if there is no ping connection three times, do the following

If [$ping-eq 0]

Then

# check whether the mailinfo file exists. If it does not exist, create it.

If [!-e. / mailinfo]

Then

Touch. / mailinfo

Fi

# get the current host time, which is used to display the time of the message body

Now_time= `date`

# check whether the number of lines in. / mailinfo is empty, and send email directly if it is empty

Row_num= `wc-l. / mailinfo | cut-c 1`

If [$row_num-eq 0]

Then

Echo "send email"

Echo-e "1.69 network has been disconnected, please check\ n\ nalarm time: $now_time" | mutt-s "1.69 alarm" $mail_list

# update the last time sent

Date +% Y%m%d-%H%M >. / mailinfo

Echo 1 > >. / mailinfo

# if the mailinfo content is not empty, determine whether the current time minus 1 hour is greater than the last time it was sent, and if so, send an email

Else

# get the date and time of the last email

Last_date= `head-1. / mailinfo | cut-c 1-8`

Last_time= `head-1. / mailinfo | cut-c 10-13`

# get the date and time of 1 hour ago

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

Current_time= `date +% H% M`

# calculate the difference between the current time and the last time. Add 10 # to prevent characters starting with 0 from being calculated as octal.

Let time_diff=10#$current_time-10#$last_time

# get the number of times sent

Send_times= `tail-1. / mailinfo`

# send email in the following four ways:

# current date > last date, you can send it, and then send count send_times set to 1

If ["$current_date"-gt "$last_date"]

Then

Echo "send email"

Echo-e "1.69 network has been disconnected, please check\ n\ nalarm time: $now_time" | mutt-s "1.69 alarm" $mail_list

# update the last time sent

Date +% Y%m%d-%H%M >. / mailinfo

Echo 1 > >. / mailinfo

Fi

# the current date is equal to the last date and. If this time is less than 1 hour, you can send it, and then set the send count send_times to 1.

If ["$current_date"-eq "$last_date"-a $time_diff-ge 100]

Then

Echo "send email"

Echo-e "1.69 network has been disconnected, please check\ n\ nalarm time: $now_time" | mutt-s "1.69 alarm" $mail_list

# update the last time sent

Date +% Y%m%d-%H%M >. / mailinfo

Echo 1 > >. / mailinfo

Fi

# current date equals last date and send count send_times is set to 1, can be sent, and then send times plus 1

If ["$current_date"-eq "$last_date"-a $send_times-eq 1]

Then

Echo "send email"

Echo-e "1.69 network has been disconnected, please check\ n\ nalarm time: $now_time" | mutt-s "1.69 alarm" $mail_list

# update the last time sent

Date +% Y%m%d-%H%M >. / mailinfo

Echo 2 > >. / mailinfo

Fi

# current date equals last date and send count send_times is set to 2, can be sent, and then send times plus 1

If ["$current_date"-eq "$last_date"-a $send_times-eq 2]

Then

Echo "send email"

Echo-e "1.69 network has been disconnected, please check\ n\ nalarm time: $now_time" | mutt-s "1.69 alarm" $mail_list

# update the last time sent

Date +% Y%m%d-%H%M >. / mailinfo

Echo 3 > >. / mailinfo

Fi

Fi

Fi

At this point, the study on "how to write a Shell script to detect the smooth flow of an ip network" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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