PHP ssh working from command line, not working from web page

Question

I am using PHP to ssh into a main computer and run a command. My code is posted below but I'm stuck having the following issue:

When I run this command from the Ubuntu command line it works flawlessly. However when I try and run it via the web page I believe the ssh commands are not running. Not sure if I am running into issues with permissions, or if I am running into issues with my actually ssh command in php. Any help would be appreciated.

    $cmd = "ssh name@ip 'echo hello'";
    $var = shell_exec($cmd);
    echo $var;

maybe the user that you use in command line and web server have different permissions? — haynar
– haynar, Commented Aug 7, 2012 at 15:21
As below, ssh is usually not allowed on any security-minded hosting company! ... It may allow direct, but not via web server. — Brian
– Brian, Commented Aug 7, 2012 at 15:39

Daniel Li · Accepted Answer · 2012-08-07 15:21:11Z

3

Rather than using shell_exec (which may be disabled for security reasons), look into using libssh2.

Reference: http://php.net/manual/en/book.ssh2.php

answered Aug 7, 2012 at 15:21

Daniel Li

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Barmar · Accepted Answer · 2012-08-07 15:36:58Z

0

My guess would be that the user that the webserver runs as doesn't have your private key file in its ~/.ssh directory.

answered Aug 7, 2012 at 15:36

Barmar

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