Yep, that's exactly what he meant: Here's how to get out of vi when you get stuck there, and here's how to undo the stupid thing you just did to try make your w

Yep, that's exactly what he meant: Here's how to get out of vi when you get stuck there, and here's how to undo the stupid thing you just did to try make your website work. For web stuff you usually do want 0644, or 0664 if the files are owned by your user account and not apache.