skrip untuk secara otomatis menguji apakah situs web tersedia

Saya seorang pengembang web tunggal dengan Centos VPS saya sendiri yang meng-hosting beberapa situs web kecil untuk klien saya. Hari ini saya menemukan layanan httpd saya telah berhenti (tanpa alasan yang jelas - tapi itu utas lainnya). Saya memulainya kembali tetapi sekarang saya harus menemukan cara agar saya dapat diberi tahu melalui email dan / atau SMS jika itu terjadi lagi - saya tidak suka ketika klien saya menelepon saya untuk memberi tahu saya bahwa situs web mereka tidak berfungsi!

Saya tahu mungkin ada banyak kemungkinan yang berbeda, termasuk perangkat lunak pemantauan server. Saya pikir semua yang saya butuhkan adalah skrip yang dapat saya jalankan sebagai cron job dari host dev saya (yang berjalan secara permanen di kantor saya) yang mencoba memuat halaman dari server produksi saya dan jika tidak dimuat dalam katakana 30 detik kemudian mengirimi saya email atau SMS. Saya cukup sampah di skrip shell, maka pertanyaan ini.

Setiap saran akan sangat dihargai.

Yah ... Script paling sederhana, saya bisa menulis:

/usr/bin/wget "www.example.com" --timeout 30 -O - 2>/dev/null | grep "Normal operation string" || echo "The site is down" | /usr/bin/mail -v -s "Site is down" your@e-mail.address

Tambahkan ke cron sebagai:

* * * * * /usr/bin/wget "www.example.com" --timeout 30 -O - 2>/dev/null  | grep "Normal operation string" || echo "The site is down" | /usr/bin/mail -v -s "Site is down" your@e-mail.address

Tetapi terlalu sederhana untuk memberi tahu Anda apa masalahnya jika ada.

UPD: Sekarang one-liner ini memeriksa string tertentu pada halaman ("string operasi normal"), yang seharusnya muncul hanya pada operasi normal.

UPD2: Cara sederhana untuk mengirim halaman kesalahan dalam email:

/usr/bin/wget "www.example.com" --timeout 30 -O - 2>/dev/null | grep "Normal operation string" || /usr/bin/wget "www.example.com" --timeout 30 -O - 2>/dev/null | /usr/bin/mail -v -s "Site is down" your@e-mail.address

Yang minus adalah bahwa halaman diminta kembali jika terjadi kegagalan tes pertama. Kali ini permintaan mungkin berhasil dan Anda tidak akan melihat kesalahan. Tentu saja, dimungkinkan untuk menyimpan output dan mengirimkannya sebagai lampiran, tetapi itu akan membuat skrip lebih kompleks.

Lihatlah skrip ini:

• http://answers.google.com/answers/threadview/id/276934.html

curladalah utilitas baris perintah untuk mengambil URL. Skrip memeriksa kode keluar ($? Mengacu pada kode keluar dari perintah terbaru dalam skrip shell) dan jika itu selain 0, melaporkan kesalahan (kode keluar 0 biasanya merujuk pada keberhasilan). Seperti disebutkan dalam jawaban HUB, Anda juga bisa hanya ||pada baris perintah untuk menjalankan perintah kedua ketika yang pertama gagal.

Setelah status Anda diketahui, Anda hanya perlu mengirim sendiri beberapa surat. Berikut adalah contoh yang menggunakan mailperintah untuk mengirim email dari skrip shell, dengan asumsi kotak yang Anda uji memiliki penyiapan SMTP:

• http://www.crazysquirrel.com/computing/debian/scripts/email-via-script.jspx

BTW: jika Anda tidak mahir dalam skrip shell, jangan membatasi diri Anda pada skrip shell. Anda dapat menggunakan skrip ruby, skrip php, skrip apa pun yang dapat dijalankan oleh server Anda! Cukup tambahkan #!/path/to/executablebaris di awal skrip - misalnya:

#!/usr/bin/php

Periksa skrip ini . itu memeriksa daftar situs web dan mengirim email (ke daftar email) setiap kali ada yang salah (respon http berbeda dari 200). Skrip membuat file .temp untuk "mengingat" situs web mana yang gagal pada pemeriksaan terakhir sehingga Anda tidak akan mendapatkan banyak email. file .temp dihapus ketika situs web berfungsi kembali.

#!/bin/bash
# list of websites. each website in new line. leave an empty line in the end.
LISTFILE=/scripts/isOnline/websites.lst
# Send mail in case of failure to. leave an empty line in the end.
EMAILLISTFILE=/scripts/isOnline/emails.lst

# `Quiet` is true when in crontab; show output when it's run manually from shell.
# Set THIS_IS_CRON=1 in the beginning of your crontab -e.
# else you will get the output to your email every time
if [ -n "$THIS_IS_CRON" ]; then QUIET=true; else QUIET=false; fi

function test {
  response=$(curl --write-out %{http_code} --silent --output /dev/null $1)
  filename=$( echo $1 | cut -f1 -d"/" )
  if [ "$QUIET" = false ] ; then echo -n "$p "; fi

  if [ $response -eq 200 ] ; then
    # website working
    if [ "$QUIET" = false ] ; then
      echo -n "$response "; echo -e "\e[32m[ok]\e[0m"
    fi
    # remove .temp file if exist.
    if [ -f cache/$filename ]; then rm -f cache/$filename; fi
  else
    # website down
    if [ "$QUIET" = false ] ; then echo -n "$response "; echo -e "\e[31m[DOWN]\e[0m"; fi
    if [ ! -f cache/$filename ]; then
        while read e; do
            # using mailx command
            echo "$p WEBSITE DOWN" | mailx -s "$1 WEBSITE DOWN" $e
            # using mail command
            #mail -s "$p WEBSITE DOWN" "$EMAIL"
        done < $EMAILLISTFILE
        echo > cache/$filename
    fi
  fi
}

# main loop
while read p; do
  test $p
done < $LISTFILE

Tambahkan baris berikut ke config crontab ($ crontab -e)

THIS_IS_CRON=1
*/30 * * * * /path/to/isOnline/checker.sh

Tersedia di Github

Saya tahu bahwa semua skrip di atas adalah persis apa yang Anda minta, tetapi saya akan menyarankan melihat monit karena itu akan mengirimi Anda email jika apache turun tetapi juga akan me-restart itu (jika turun).

Saya akan merekomendasikan pingdom untuk ini. Layanan gratis mereka memungkinkan Anda memeriksa 1 situs, tetapi hanya itu yang Anda perlukan untuk memeriksa 1 server. Jika Anda memiliki iPhone, mereka mengirim pesan push kepada Anda secara gratis, jadi tidak perlu membeli kredit SMS dari mereka, dan mereka memiliki beberapa pengaturan yang dapat Anda gunakan. Milik saya diatur untuk memberi tahu saya setelah 2 mencoba lagi (10 menit) dan setiap 10 menit setelahnya. Ini luar biasa, karena ia juga memeriksa pesan-pesan HTTP 500 yang mengindikasikan sebuah situs sedang down. Jika gagal, segera memeriksa situs Anda lagi dari server yang berbeda di lokasi yang berbeda. Jika itu gagal, yah, itu memicu preferensi Anda tentang bagaimana / kapan Anda ingin mendapat pemberitahuan.

Sedikit variasi di atas.

Sebuah skrip untuk memeriksa apakah suatu situs web tersedia setiap 10 detik. Log gagal mencoba menjadi siteuptime.txtfile sehingga dapat dilihat (atau digambarkan dalam excel) nanti.

#!/bin/bash
# Check site every 10 seconds, log failed connection attempts in siteuptime.txt
while true; do
echo "Checking site...";
/usr/bin/wget "http://www.mysite" --timeout 6 -O - 2>/dev/null | grep "My String On page" || echo "The site is down" | date --iso-8601=seconds >> siteuptime.txt;
sleep 10;
done;

#!/bin/bash

################Files to be created before starting exicution####################
# sudo apt-get install alsa alsa-utils                                                  #
# mkdir -p $HOME/scripts                                                                    #
# touch $HOME/scripts/URL_File                                                              #
# touch $HOME/scripts/alert_Data                                                            #
# touch /tmp/http                                                                               #
# touch /tmp/http_file                                                                        #
# Download alert.wav file and copy it into $HOME/scripts directory                #
#################################################################################

####### checking existing process and creating temp files for URLs###############
Proc=$(ps -ef | grep http_alerts.sh | wc -l)
number=$(ps -ef | grep http_alerts.sh)
if [ $Proc -gt 3 ]
then
    echo "Script Already Running. Please kill PID($number) and restart"
else
FILE="$HOME/scripts/URL_File"
myfileval=1
while read -r line_read; do
    echo $line_read > /tmp/http_file
    File_name=$(cat /tmp/http_file | awk -v "val=$myfileval" 'NR==val {print $2}')
    File_name_val=$(ls /tmp/$File_name 2>/dev/null | wc -l)
    File_name_val0=0
    if [ $File_name_val -eq $File_name_val0 ]
    then 
        touch /tmp/$File_name
    fi
done < "$FILE"
####### checking existing process and finding temp files for URLs###############
echo "############ SCRIPT STARTED WORKING ################"
echo "############ SCRIPT STARTED WORKING ################" >> $HOME/scripts/alert_Data
echo " " >> $HOME/scripts/alert_Data
####### Continues Loop to check the URLs without break           ###############
while true
do
#######  Reading file URLs                                       ###############
### URL formate- http or https URL; 
### remarks; if domain name 0 else 1; 
### domain without proto(http/https); 
### Public_1; Public_2; ########
filename="$HOME/scripts/URL_File" ### file path
while read -r line; do
        echo $line > /tmp/http ### inserting each line data to temparary file
### Checking Internet Connection #######
        while true
        do
            if ping -q -c 1 -W 1 8.8.8.8 >/dev/null; 
        then   
            break
        else 
            echo "You are not connected to internet. Please wait"
            sleep 5  
        fi
        done 
### Checking Internet Connection #######
    myval=1
    i=$((i+1))
    j=7
    k=$(shuf -i 1-${j} -n 1)
    l=30
    i=$(($l+$k)) ##### Color code 31 to 37
    echo ""
    echo ""
    URL=$(cat /tmp/http |  awk -v "val=$myval" 'NR==val {print $1}')  ### 1st paramater from file. example: http://myabcd.com
    Server_State=$(cat /tmp/http |  awk -v "val=$myval" 'NR==val {print $2}') ### 2nd paramater from file. example: this_is_myabcd_site
    val3=$(cat /tmp/http | awk -v "val=$myfileval" 'NR==val {print $3}') ### 3rd paramater from file. 0 or 1
    val4=$(cat /tmp/http | awk -v "val=$myfileval" 'NR==val {print $4}') ### 4rd paramater from file. example: myabcd.com
    val5=$(cat /tmp/http | awk -v "val=$myfileval" 'NR==val {print $5}') ### 5th paramater from file. example: 123.123.123.111
    val6=$(cat /tmp/http | awk -v "val=$myfileval" 'NR==val {print $5}') ### 6th paramater from file. example: 123.123.123.222
echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
echo "\e[1;${i}m| Cheking URL :   $URL                             \e[0m"
echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
echo "\e[1;${i}m| Cheking URL :   $URL                             \e[0m" >> $HOME/scripts/alert_Data
DATA=$(date) ### time stamp 
code=$(curl -s -o /dev/null -w "%{http_code}" $URL) ### getting URL response code
if [ $code -eq 200 -o $code -eq 301 -o $code -eq 302 ] ### checking with sucessful response codes
then 
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
    echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m"
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
    echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" 
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" 
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
elif [ $code -eq 404 -o $code -eq 500 ] ### checking with error response codes
then 
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
    echo "\e[1;${i}m| URL IS DOWN :   $URL                             \e[0m"
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
    echo "\e[1;${i}m| DOWN TIME   :   $DATA                            \e[0m"
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
    echo "\e[1;${i}m| HTTP TIME   :   $code                            \e[0m"
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m"
    echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m"
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m| URL IS DOWN :   $URL                             \e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m| DOWN TIME   :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m| HTTP CODE   :   $code                            \e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
    echo "\e[1;${i}m-------------------------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
    aplay $HOME/scripts/alert.wav 2> /dev/null ### On failure buzzer will sound
    /usr/bin/truncate -s 0 /tmp/$Server_State  ### truncate the file with server failure count data
    echo " Dear Admin Team \n The $URL is DOWN for the State $Server_State. The HTTP response code is $code " | mail -s "$Server_State is down" -a "From: from@mail.com" yourmail1@mail.com,yourmail2@mail.com >> /dev/null   ### On failure sending mail
elif [ $code -eq 000 ]
then
   LNUM=$(cat /tmp/$Server_State | wc -l)
   LNUM0=0
   oval=0
    if [ $val3 -eq $oval ] ### checking Domain or Public IP
    then
    dname=$(nslookup $val4 | awk '/^Address: /{print $2}') ### getting domain name Public IPs
        for dname_i in $dname
        do
            dname_url="http://$dname_i/" ### Making Public IP as http URL
            dname_code=$(curl -s -o /dev/null -w "%{http_code}" $dname_url)  ### getting public IP response
            if [ $dname_code -eq 200 -o $dname_code -eq 301 -o $dname_code -eq 302 ]  ### If success response
            then
            echo "\e[1;${i}m---------------------------------------------------\e[0m"
            echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m"
            echo "\e[1;${i}m---------------------------------------------------\e[0m"
            echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" 
            echo "\e[1;${i}m---------------------------------------------------\e[0m" 
            echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
            echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
            echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
            echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
            echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
            else #### if did not success response 
                    if [ $LNUM -eq $LNUM0 ] ### If no failure count, then add the failure count from 1
                        then
                        echo "$Server_State 0" > /tmp/$Server_State
                        else 
                        ALT=$(cat /tmp/$Server_State |  awk -v "val=$myval" 'NR==val {print $2}')  ### server failure count
                        ALT5=5
                        if [ $ALT -eq $ALT5 ] ### If failure count is 5 then alert with sound and send mail
                        then
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| URL IS DOWN :   $URL                             \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| DOWN TIME   :   $DATA                            \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| HTTP CODE   :   $code                            \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| Server State:   $Server_State                    \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| URL IS DOWN :   $URL                             \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| DOWN TIME   :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| HTTP CODE   :   $code                            \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        aplay $HOME/scripts/alert.wav 2> /dev/null  ### On failure buzzer will sound
                        /usr/bin/truncate -s 0 /tmp/$Server_State   ### truncate the file with server failure count data
                        echo " Dear Admin Team \n The $URL is DOWN for the State $Server_State. The HTTP response code is $code " | mail -s "$Server_State is down" -a "From: from@mail.com" yourmail1@mail.com,yourmail2@mail.com >> /dev/null   ### On failure sending mail 
                        else
                        ALT=$((ALT+1)) ### increase server failure count
                        echo "$Server_State $ALT" > /tmp/$Server_State
                        fi
                        fi
                    fi
                    done
                    oval1=1
                    elif [ $val3 -eq $oval1 ]   ### No domain name backup public IPs are there
                    then
                        if [ "$val5" != "" ]  ### first Public IP of diffrent ISP
                        then 
                        dname_url="http://$val5/" ### making URL with public IP
                        dname_code=$(curl -s -o /dev/null -w "%{http_code}" $dname_url)   ### getting response code
                        if [ $dname_code -eq 200 -o $dname_code -eq 301 -o $dname_code -eq 302 ] ### validating response code
                        then
                        echo "\e[1;${i}m---------------------------------------------------\e[0m"
                        echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m"
                        echo "\e[1;${i}m---------------------------------------------------\e[0m"
                        echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" 
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" 
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        elif [ "$val6" != "" ]  ### second Public IP of diffrent ISP
                        then 
                        dname_url="http://$val6/" ### making URL with public IP
                        dname_code=$(curl -s -o /dev/null -w "%{http_code}" $dname_url)   ### getting response code
                        if [ $dname_code -eq 200 -o $dname_code -eq 301 -o $dname_code -eq 302 ] ### validating response code
                        then
                        echo "\e[1;${i}m---------------------------------------------------\e[0m"
                        echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m"
                        echo "\e[1;${i}m---------------------------------------------------\e[0m"
                        echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" 
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" 
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m| UP TIME     :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[1;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        else
                        if [ $LNUM -eq $LNUM0 ]
                        then
                        echo "$Server_State 0" > /tmp/$Server_State
                        else
                        ALT=$(cat /tmp/$Server_State |  awk -v "val=$myval" 'NR==val {print $2}')  ### server failure count
                        ALT5=5
                        if [ $ALT -eq $ALT5 ]
                        then
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| URL IS DOWN :   $URL                             \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| DOWN TIME   :   $DATA                            \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| HTTP CODE   :   $code                            \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m"
                        echo "\e[0;${i}m| Server State:   $Server_State                    \e[0m"
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| URL IS DOWN :   $URL                             \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| DOWN TIME   :   $DATA                            \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| HTTP CODE   :   $code                            \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m| Server State:   $Server_State                    \e[0m" >> $HOME/scripts/alert_Data
                        echo "\e[0;${i}m---------------------------------------------------\e[0m" >> $HOME/scripts/alert_Data
                        aplay $HOME/scripts/alert.wav 2> /dev/null
                        /usr/bin/truncate -s 0 /tmp/$Server_State
                        echo " Dear Admin Team \n The $URL is DOWN for the State $Server_State. The HTTP response code is $code " | mail -s "$Server_State is down" -a "From: from@mail.com" yourmail1@mail.com,yourmail2@mail.com >> /dev/null   ### On failure sending mail
                        else
                        ALT=$((ALT+1))
                        echo "$Server_State $ALT" > /tmp/$Server_State
                        fi
                    fi
                fi
            fi
        fi
    fi
fi
sleep 4
vl=1
pdate=$(ls -l $HOME/scripts/alert_Data | awk -v "val=$vl" 'NR==val {print $7}')   ### getting file created day
ddate=$(date | awk -v "val=$vl" 'NR==val {print $3}') ### current day count
if [ $pdate -gt $ddate ]  ### validating file created day and current
then 
d=`date +%m-%d-%Y`
mv $HOME/scripts/alert_Data $HOME/scripts/alert_Data$d  ### taking backup of existing file with time stamp
touch $HOME/scripts/alert_Data ### creating new file
fi
done < "$filename"
done
fi
#######################################################################################################################################################
#The content of $HOME/scripts/URL_File is as below
#Please remove "#" and Headline titles. Each parameter will be read by the difrence of spaces.
#URLoftheSite           Remarks         Domain(0)/IPstatus(1)   Domain_name(without protocol)   PublicIP_1      PublicIP_2  
#http://myexamplesite.com   this_is_myexamplesite   1           myexamplesite.com       123.123.123.111     123.123.123.222

Karena Anda memiliki banyak situs di VPS Anda, saya akan merekomendasikan Anda dapat membuka akun dengan situs pemantauan situs web seperti host-tracker.com. Selain memberi tahu Anda jika situs sedang down atau tidak mereka juga memberi Anda uptime mingguan, bulanan, dan tahunan dari situs Anda. Whish sangat membantu untuk manajemen dan kinerja.

Bagaimana dengan ini:

#!/bin/bash
/etc/init.d/httpd status
if [[ $? == 3 ]]; then
   echo "Httpd is down `date`" | mail support@example.com
   exit 1
fi
exit 0