What do the various apache error codes mean?

100 - Informative

• 100 Continue
• 101 Switching Protocols

200 - Client Request Successful

• 200 Okay
• 201 Created
• 202 Accepted
• 203 Non-Authoritative Information
• 204 No Content
• 205 Reset Content
• 206 Partial Content

300 - Client Request Redirected, further action necessary

• 300 Multiple choices
• 301 Moved Permanently
• 302 Moved Temporarily
• 303 See Other
• 304 Not Modified (This means the file was loaded from the browser cache instead of being resent by the server)
• 305 Use Proxy

400 - Client request incomplete

• 400 Bad Request
• 401 Unauthorized
• 402 Payment Required
• 403 Forbidden
• 404 Not Found
• 405 Method Not Allowed
• 406 Not Acceptable
• 407 Proxy Authentication Required
• 408 Request Time-Out
• 409 Conflict
• 410 Gone
• 411 Length Required
• 412 Precondition Failed
• 413 Request Entity Too Large
• 414 Request - URL Too large
• 415 Unsupported Media Type

500 - Server Errors

• 500 Server Error
• 501 Not Implemented
• 502 Bad Gateway
• 503 Out of Resources
• 504 Gateway Time-Out
• 505 HTTP Version not supported