How to run a SSH command from www-data

I need to run this command from php/nginx (www-data)

shell_exec("ssh -o StrictHostKeyChecking=no root@$host 'ps axo pid,cmd'")


But get this error

Failed to add the host to the list of known hosts (/root/.ssh/known_hosts).
Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).


www-data

3 Answers
3

Please use "phpseclib" for a PHP SSH implementation.
Below is the example:

<?php
include('Net/SSH2.php');

$ssh = new Net_SSH2('www.example.com');
if (!$ssh->login('uname', 'password')) {
exit('Login Failed');
}

echo $ssh->exec('pwd');
echo $ssh->exec('ls -la');
?>


It's a permission issue while the www-data user doesn't have write permission to /var/www/.ssh directory (/var/www is default home folder for www-data user).

The issue should resloved by run following commands

mkdir /var/www/.ssh
chown -R www-data:www-data /var/www/.ssh


its permission error. you need to add - 'sudo' before command.

sudo shell_exec("ssh -o StrictHostKeyChecking=no root@$host 'ps axo pid,cmd'")


sudo

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