using the command line from PHP

[severndigital]

SO i need to run an command line from my PHP script ... the only problem is, the command needs to be run on a different server.

 

i need to log into the other server using SSH and then run the command.

 

how I get PHP to do that?... CAN I get php to do that?

 

I looked into the ssh2 commands, but I won't be able to install that on our webserver.

 

I guess my biggest hold up is that the ssh command prompts me for a password.

 

How can I get around that? or get PHP to input the password for me?

 

 

Any help would be great. Thanks

 

 

 

 

 

[patrickmvi]

What ssh command are you trying to use?  There may a command-line option to it that allows you to pass the password right to it.  Besides that, it might be a little tricky to pass information back and forth to the command.  There may be some way to implement some sort of rsh-like functionality via SSH which would allow you to run commands remotely provided that permissions are all set correctly.

[nadeemshafi9]

i think you can do it using ftp_site which has some basic commands

 

http://uk2.php.net/manual/en/function.ftp-exec.php - this one i think

 

http://uk2.php.net/ftp_site

 

http://uk2.php.net/manual/en/function.ftp-raw.php

[nadeemshafi9]

What ssh command are you trying to use?  There may a command-line option to it that allows you to pass the password right to it.  Besides that, it might be a little tricky to pass information back and forth to the command.  There may be some way to implement some sort of rsh-like functionality via SSH which would allow you to run commands remotely provided that permissions are all set correctly.

 

what like do the command on the local-remote which exectues it on the remote-remote ? sounds good

[Adam]

How about system() or exec()?

[severndigital]

i'm just trying to get into the other box using

 

in the command line directly I would type

 

ssh servername -l username

 

it will prompt me for a password

 

Once I am logged into the other box, I would just issue the command line I need.

 

the command line is an actual program command not just an ls or something so I'm not sure FTP_SITE would work.

 

it looks something like this

 

/usr/bin/app p32 -P -T7we -p/tmp/output/filename.xml -gd=true

 

it basically tells one of our production applications to export certain data and output it to an xml file that our website will then pick up.

 

[nadeemshafi9]

How about system() or exec()?

 

forgive me if im wrong off teh top of my head i think they cant exec remotley ? or am i wrng ?

 

i'm just trying to get into the other box using

 

in the command line directly I would type

 

ssh servername -l username

 

 

you can do that with exec

 

 

you got confused with you server to server comms, you wont be executing that command on server 2 you will be executing it on server 1

 

 

 

 

but there is a better way execute it directly on server 2 using server 1.

 

<?php

// variable initialization
$command = 'ls -al >files.txt';

// set up basic connection
$ftp_server = "ftp.example.com";
$conn_id = ftp_connect($ftp_server);

// login with username and password
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);

// execute command
if (ftp_exec($conn_id, $command)) {
    echo "$command executed successfully\n";
} else {
    echo "could not execute $command\n";
}

// close the connection
ftp_close($conn_id);

?>

 

 

or you can execute the commands on server 1 just like you would do on a command line from server 1 to server 2

[severndigital]

you can do that with exec

 

yeah i know, but then it prompts for a password ... how do i put that in there?

[severndigital]

forget it .. i am just going to have server 1 create a file with the command line it needs run in it.

 

then i will have server 2 watch the folder, if it sees a file there, it will parse it, execute the command and delete server 1 created file.

 

 

[Adam]

If you decide to still go ahead with original idea, there is a way you can do it by generating a new key. Found this:

 

https://lists.ubuntu.com/archives/ubuntu-users/2006-June/082869.html

[Daniel0]

You can just pass the command directly to ssh.

 

Example:

daniel@daniel0:~$ ssh daniel@phpfreaks.com 'df -h' # on phpfreaks
Filesystem            Size  Used Avail Use% Mounted on
/dev/simfs            200G   22G  179G  11% /
daniel@daniel0:~$ df -h # here
Filesystem            Size  Used Avail Use% Mounted on
/dev/simfs             40G  888M   39G   3% /
tmpfs                 4,0G     0  4,0G   0% /lib/init/rw
tmpfs                 4,0G     0  4,0G   0% /dev/shm

[severndigital]

You can just pass the command directly to ssh.

 

Example:

daniel@daniel0:~$ ssh daniel@phpfreaks.com 'df -h' # on phpfreaks
Filesystem            Size  Used Avail Use% Mounted on
/dev/simfs            200G   22G  179G  11% /
daniel@daniel0:~$ df -h # here
Filesystem            Size  Used Avail Use% Mounted on
/dev/simfs             40G  888M   39G   3% /
tmpfs                 4,0G     0  4,0G   0% /lib/init/rw
tmpfs                 4,0G     0  4,0G   0% /dev/shm

 

the command still asks for the password.

 

I need PHP to be able to input the password for the other machine.

[Daniel0]

Use public key authentication instead of password authentication.

[Maq]

Use public key authentication instead of password authentication.

 

Here's the tutorial I use:

 

http://wp.uberdose.com/2006/10/16/ssh-automatic-login/