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Running Linux Commands through PHP

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gargg321

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Running Linux Commands through PHP

Sep 25th, 2008

Hey folks,

I am fairly new in the field of PHP. I have to prepare a module that will show the CPU utilization, current processes, memory utilization and disk quota of a remote system when asked on a PHP page. I am clueless about how to proceed in this matter. My seniors asked me to do scripting in PHP through which I must run Linux Commands and then parse the result I got and display it in a web browser. Please help me out and guide me how to proceed in this matter.

Thanks

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Re: Running Linux Commands through PHP

Sep 25th, 2008

You can execute linux commands within a php script - all you have to do is put the command line in backticks (`).

And also concentrate on exec() , this and shell_exec()..

Last edited by Shanti Chepuru; Sep 25th, 2008 at 2:20 am.

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Re: Running Linux Commands through PHP

Sep 25th, 2008

Thanks Shanti but would you be a bit elaborate about how could I log in to a remote server. I had visited php.net earlier but the first and foremost problem for me is to log into the remote system. Suppose the username is "abcde", password is "wxyz" and IP address is 100.100.100.100. Please tell me how to first log into this system using these parameters. Any sort of help would be much appreciated.

Thanks Again
Gaurav

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Re: Running Linux Commands through PHP

Sep 25th, 2008

Sorry...i don't know much on this...
Any other experts will get you the information....
Sorry...

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Re: Running Linux Commands through PHP

Sep 25th, 2008

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Originally Posted by gargg321

Thanks Shanti but would you be a bit elaborate about how could I log in to a remote server. I had visited php.net earlier but the first and foremost problem for me is to log into the remote system. Suppose the username is "abcde", password is "wxyz" and IP address is 100.100.100.100. Please tell me how to first log into this system using these parameters. Any sort of help would be much appreciated.

Thanks Again
Gaurav

It would probably be best to create a PHP page on the remote system that will get the "memory utilization and disk quota of a remote system" and display it to HTTP.

eg:

http://remote-sever.com/memory-and-disk-quota.php

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
 
$results = exec('your command');
echo $results;
 
?>
<?php

$results = exec('your command');
echo $results;

?>

Then from your local machine query the remote system over HTTP:

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
 
$results = file_get_contents('
http://remote-sever.com/memory-and-disk-quota.php');
 
echo $results;
 
?>
<?php

$results = file_get_contents('
http://remote-sever.com/memory-and-disk-quota.php');

echo $results;

?>

You can also build authentication into the remote machine, or use basic auth, etc.

eg: basic auth

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
<?php
 
$results = file_get_contents('
http://user:pass@remote-sever.com/memory-and-disk-quota.php');
 
echo $results;
 
?>
<?php

$results = file_get_contents('
http://user:pass@remote-sever.com/memory-and-disk-quota.php');

echo $results;

?>

This way, you don't ever send arbitrary code to the remote system, and limit the code execution to that hardcoded into your PHP file.

If you really need to pass arbitrary commands to the remote system for some reason, you may want to implement the SSH protocol. In this way, your PHP script will act as an SSH client, that will log into the SSH server on the remote system, execute commands and read the response.

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Re: Running Linux Commands through PHP

Nov 13th, 2008

Hi,

Pls tell me how to code this shell command in PHP

( echo "RGBA32 88 31 20 25 0 1" ; cat /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.rgba ) > /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo &

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<?php

echo shell_exec('( echo "RGBA32 197 32 120 205 0 1" ; cat /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.rgba ) > /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo &');
?>

I tried above but it seems not working no output.

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Re: Running Linux Commands through PHP

Nov 13th, 2008

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Originally Posted by john_robot

Hi,

Pls tell me how to code this shell command in PHP

( echo "RGBA32 88 31 20 25 0 1" ; cat /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.rgba ) > /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo &

I tried above but it seems not working no output.

There will be no output from those set of commands. All output from the first and seconds are sent to: /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo

so if you want to see if it works, view the contents of /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo

eg:

Help with Code Tags

PHP Syntax (Toggle Plain Text)

cat /var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo

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Re: Running Linux Commands through PHP

Nov 13th, 2008

ok Thank you next thing is this SSH command its working fine on the command prompt(file converting). but not working in PHP. ( the file not converting)

mencoder -oac copy -vf bmovl=0:0:mylogo.fifo -ovc raw -o t2.mpg t1.mpg

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<?php
echo shell_exec('/usr/bin/mencoder -oac copy -vf bmovl=0:0:/var/www/vhosts/lankaclipstv.com/httpdocs/mylogo.fifo -ovc raw -o /var/www/vhosts/lankaclipstv.com/httpdocs/t2.mpg /var/www/vhosts/lankaclipstv.com/httpdocs/t1.mpg');
?>

what do i have to do to fix this ?