Linux or Plesk Server Error 500

Posted on by admin

Are you experiencing a 500 error when trying to load your website(s), or a web panel such as Plesk or cPanel? Do you have an error Database DB query failed: SQLSTATE[HY000]?

One of the most common reasons for a 500 error is that the server has run out of disk space or inodes.

  1. Log into the server via SSH. Even when a web server is experiencing 500 errors, SSH and overall system available should not be compromised. If they are, you’re looking at a bigger problem.
  2. Check disk space for all partitions:
    df -h
    If any partitions have reached 99 or 100%, you can expect 500 errors as a possible affect.
  3. Check inode limit:
    df -i
    If IUse% is 99 or 100%, this can be another cause for 500 errors on a website, Plesk, or cPanel.
  4. If either limit has been reached, you will need to either remove files to free up space, add space and expand the partition, or migrate to a larger server.
    On a Plesk server, you can try to access the Repair Tool to remove temporary files:
    https://hostname:8443/repair/
    You can also list backups on a Plesk server:
    /usr/local/psa/admin/bin/pmm-ras --get-dump-list | grep .xml:
    And remove them:
    /usr/local/psa/admin/bin/pmm-ras --verbose --debug --delete-dump --dump-specification=backup_info_2301201234.xml --session-path=/var/log/plesk/PMM
    If SSH is available, SFTP should also be available to connect with an FTP client (such as FileZilla) on port 22 to navigate and remove unwanted files.