using SSH in PHP invokes 'Host Key Verification Failed' error
 

Hi all,

Im trying to do a remote execution of scripts through SSH in PHP.

What im doing:
-Use PHP in conjunction with nagios' check_by_ssh script to execute the script.
-I used
-It gives me a 'Host key verification failed' error even though i enabled it to ssh from my server to server01 without password.

My Qn:
How do i get it to work?

You need an entry in your known_hosts file. There's a system wide one as well as a per-user one. You can just manually run an ssh connection to that server, and then put it's hostkey in your system-wide known_hosts file. I'm not sure but you may need to clean out the PHP users too.

Also, I know PHP has some built in SSH functionality, are you sure you want to be calling a shell process for this?

Hi,

im currenly tapping on the ssh script for testing purpose. If possible, it will introduce a much simpler solution for my case :) I will give it a try on the system wide known hosts file.

Thanks for your feedback.

The built in functionality isn't present on most servers and even on those it is present on it has a reputation for being buggy and difficult to use.

In my experience, the best way to do SSH from PHP is with phpseclib, a pure PHP SSH client. To do what you're trying to do you'd do something like....

$ssh = new Net_SSH2();
$ssh->login('...', '...');
echo $ssh->exec('...');