Running Linux Commands through PHP

[gargg321]

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

[Shanti C]

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() ..

[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

[Shanti C]

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

[digital-ether]

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

<?php

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

?>

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

<?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

<?php

$results = file_get_contents('
http://user:[e-mail]/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.

[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 &

<?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.

[digital-ether]

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:

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

[john_robot]

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

<?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 ?

[Yogesh2tech]

<pre>
<b>Uptime:</b>
<?php system("uptime"); ?>

<b>System Information:</b>
<?php system("uname -a"); ?>

<b>Memory Usage (MB):</b>
<?php system("free -m"); ?>

<b>Disk Usage:</b>
<?php system("df -h"); ?>

<b>CPU Information:</b>
<?php system("cat /proc/cpuinfo | grep \"model name\\|processor\""); ?>
</pre>