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How can my shell script test server status?

i am in big problem so please help on it. below i write the scripts, i don't know it is correct or not, but i want write the shell script for. In particular machine need to check all process are running or not, and we need result to display in the web page like server name = running, not only single server we have so many servers so, result like in the web page:

server1 = running
server2 = not running
server1 = running

like that so many server we have and one more thing is need show in web page with colors and fonts. please help on it!

Dave's Answer:

Since it's apparent that you are at a polytechnic in India (the submission had a ".in" email address suffix) and that you're baffled by what's a fairly rudimentary homework assignment, it would probably be better if I just ignored this question and let you figure it out yourself, but instead I cunningly waited a month or so to get here. That way, it couldn't possibly be helpful to you. :-)

Nonetheless, this really is a straightforward project, so straightforward that I will write up a simple script.

First off, how do you test to see if a server is running? Use the ping command!

For example, let me ping two servers, one I know is running and one I know isn't by virtue of the fact it's an unknown domain:

$ ping -o yahoo.com
PING yahoo.com (206.190.60.37): 56 data bytes
64 bytes from 206.190.60.37: icmp_seq=0 ttl=46 time=69.601 ms

--- yahoo.com ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max/stddev = 69.601/69.601/69.601/0.000 ms
$ echo $?
0
$ ping -o xyz.yahoo.com
ping: cannot resolve xyz.yahoo.com: Unknown host
$ echo $?
68

Really, that should be enough to show you how to proceed, but let's put it in script form:

for server in $(cat serverlist)
do
ping -o $server > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo "$server = running"
else
echo "$server = not running"
fi
done

Now that should be enough, shouldn't it? The only slight tweak: if the shell script is going to be called directly within a browser (which requires some modifications to the Apache server configuration) then it needs the following as the very first two lines of output generated by the script:

echo "Content-Type: text/html" ; echo ""

Now that should help you quickly gain an "A" in this assignment!

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Comments

what is the wep key

Posted by: marco at September 21, 2008 7:38 AM

Hey! I'm hosting a game server on my PC is there a way to put on my website if the server is online or offline? Please e-mail me if you know the answer.

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