Site Downtime

• ★ What to check if your site is down
• Domain registration-related downtime issues
• Payment and Abuse-related downtime issues
• Server-related downtime issues
• Advanced downtime troubleshooting steps

Connection Issues

• Fixing a '500 Internal Server Error' message
• Site not found
• Troubleshooting a single site's connection
• Collecting ping results
• China Firewall overview
• How to change a file extension

Hacked Sites

• Hacked sites overview
• Determining how your site was hacked
• Preventing future hacks
• Cleaning up your site after a hack

Logs

• Viewing your access and error logs via SFTP
• Viewing and examining your error log via SSH
• Viewing and examining your access.log via SSH

Command line troubleshooting tools

• Commands to troubleshoot your websites
• Using the 'top' command to troubleshoot your website
• Using the 'ps' command to troubleshoot your website

Optimization / Site Slowness

• Common reasons for poor website performance
• Troubleshooting site slowness
• Control bots, spiders, and crawlers
• Optimize CMS software
• Upload speeds are very slow
• Enable GZIP compression