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Richard Stelling
Asked: 2010-09-19 05:44:22 +0800 CST

Wordpress SSH Upgrade Problem

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Wordpress Error

I keep getting the same error, any ideas?

  1. I have generated a key without a password using ssh-keygen
  2. I set permissions on the keys to 600
  3. I have successfully logged in using ssh -i /root/.ssh/id_rsa 1**.**.*8.128
  4. I have tried changing hostname to localhost and 127.0.0.1

The server is running CentOS 5.4.

centos ssh wordpress

2 Answers

  1. This is likely because your web server is not running as root and therefore doesn't have access to file's in /root/. Run ps on the host and grep for the server process name to see the username. It may well be something like nobody. If that's the case, I would suggest generating a key specifically for use by the web server and then chowning it to the user the server runs as. Hopefully this will solve your problem :)

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  2. Here is the full solution, thanks to michaelmior for his help, it got me half way.

    1. Run this command to generate keys: ssh-keygen

      You'll get this output:

      Generating public/private rsa key pair.
Enter file in which to save the key (/home/user1/.ssh/id_rsa):
Created directory ‘/home/user1/.ssh’.
Enter passphrase (empty for no passphrase): (just hit enter, no need for a password)
Enter same passphrase again: (same thing, hit enter again)
Your identification has been saved in /home/user1/.ssh/id_rsa.
Your public key has been saved in /home/user1/.ssh/id_rsa.pub.
The key fingerprint is:
xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx [email protected]

    2. Add the public key to your authorized_keys file

    3. Move the id_rsa and id_rsa.pub to /usr/local

    4. chown the files to the same user as your webserver (in my case apache)

    5. chmod the files to 600: chmod 600 id_rsa*

    This should now work.

    However, my installation kept hanging, a quick look at the httpd error_log file show me:

    PHP Fatal error:  Allowed memory size of 33554432 bytes exhausted (tried to allocate 2966269 bytes) in /var/www/sites/....

    Adding this code to the Wordpress wp-config.php file to temporally increase the amount of memory available:

    define('WP_MEMORY_LIMIT', '64M');
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