Ping a Specific Port

Question

Xoundboy

Asked: 2011-06-21 06:37:46 +0800 CST2011-06-21 06:37:46 +0800 CST 2011-06-21 06:37:46 +0800 CST

script to automatically test if a web site is available

772

I'm a lone web developer with my own Centos VPS hosting a few small web sites for my clients. Today I discovered my httpd service had stopped (for no apparent reason - but that's another thread). I restarted it but now I need to find a way that I can be notified by email and/or SMS if it happens again - I don't like it when my client rings me to tell me their web site doesn't work!

I know there are probably many different possibilities, including server monitoring software. I think all I really need is a script that I can run as a cron job from my dev host (which is permanently running in my office) that attempts to load a page from my production server and if it doesn't load within say 30 seconds then it sends me an email or SMS. I'm pretty rubbish at shell scripting, hence this question.

Any suggestions would be gratefully appreciated.

9 Answers

Voted

HUB · Answer 1 · 2011-06-21T07:00:34+08:00

Well... The most simple script, I cam write:

/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" [email protected]

Add it to cron as:

* * * * * /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" [email protected]

But it is too simple to tell you what the problem is if it exists.

UPD: Now this one-liner checks for a specific string on the page ("Normal operation string"), which should appear only on normal operation.

UPD2: A simple way to send the error page in the e-mail:

/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" [email protected]

It's minus is that the page is re-requested in case of first test failure. This time the request may be successful and you won't see the error. Of course, it is possible to store the output and send it as an attachment, but it will make the script more complex.

mltsy · Answer 2 · 2011-06-21T07:30:05+08:00

Take a look at this script:

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

curl is a command-line utility to fetch a URL. The script checks the exit code ($? refers to the exit code of the most recent command in a shell script) and if it was anything other than 0, reports an error (an exit code of 0 generally refers to success). As mentioned in HUB's answer, you can also just || on the command-line to run a second command when the first one fails.

Once you have the status figured out, you just have to send yourself some mail. Here is an example that uses the mail command to send mail from a shell script, assuming the box you're testing from has SMTP setup:

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

BTW: if you're not good at shell scripting, don't limit yourself to a shell script. You could use a ruby script, a php script, any kind of script your server can run! Just add the #!/path/to/executable line at the beginning of the script - for instance:

#!/usr/bin/php

ET-CS · Answer 3 · 2014-08-10T07:01:26+08:00

Check this script. it's checking against a list of websites and sends email (to list of emails) whenever something wrong (http response different from 200). The script creates a .temp file to "remember" which website(s) failed at last check so you won't get multiple emails. the .temp file is deleted when the website is working again.

#!/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

Add the following lines to crontab config ($ crontab -e)

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

Available on Github

Jure1873 · Answer 4 · 2011-06-21T07:43:47+08:00

Jure1873

2011-06-21T07:43:47+08:002011-06-21T07:43:47+08:00

I know that all the above scripts are exactly what you've asked, but I would suggest looking at monit because it will send you an email if apache is down but it will also restart it (if it's down).

3

AcidRaZor · Answer 5 · 2011-06-21T06:55:37+08:00

AcidRaZor

2011-06-21T06:55:37+08:002011-06-21T06:55:37+08:00

I would recommend pingdom for this. Their free service allows you to check 1 site, but that's all you need to check 1 server. If you have an iPhone they push-message you for free, so no need to buy SMS credits from them, and they have multiple settings you can use. Mine is set to notify me after 2 retries (10min) and every 10min downtime after that. It's awesome, since it also checks for HTTP 500 messages indicating a site is down. If it fails, it immediately checks your site again from a different server in a different location. If that one fails, well, that triggers your preference in how/when you'd like to get notified.

1

dtbaker · Answer 6 · 2017-04-12T16:25:06+08:00

dtbaker

2017-04-12T16:25:06+08:002017-04-12T16:25:06+08:00

Slight variation of the above.

A script to check if a website is available every 10 seconds. Log failed attempts into a siteuptime.txt file so it can be looked at (or graphed in excel) later.

#!/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;

1

shahid shaik · Answer 7 · 2019-08-30T08:14:45+08:00

#!/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: [email protected]" [email protected],[email protected] >> /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: [email protected]" [email protected],[email protected] >> /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: [email protected]" [email protected],[email protected] >> /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

Alok · Answer 8 · 2011-06-21T22:53:24+08:00

Alok

2011-06-21T22:53:24+08:002011-06-21T22:53:24+08:00

As you have many sites on your VPS, I would recommend You can open account with website monitoring site such as host-tracker.com. Apart from alerting you if site is down or not they also provide you weekly,monthly and yearly uptime of ur sites. Whish is very helpful for management and performance.

0

frogstarr78 · Answer 9 · 2011-06-21T22:58:23+08:00

frogstarr78

2011-06-21T22:58:23+08:002011-06-21T22:58:23+08:00

How about this:

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

0

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