FTP 211 System Status vs 500 Syntax Error
FTP 211 (System Status) is a 2xx Positive Completion response, while 500 (Syntax Error) is a 5xx Permanent Negative response. 211 indicates that system status or system help reply. The server provides information about its current status or available features. In contrast, 500 means that syntax error, command unrecognized. The server could not parse the command. This may also be sent when the command line is too long.
説明
System status or system help reply. The server provides information about its current status or available features.
このコードが表示される場合
After issuing the STAT command without arguments, the server returns its system status and supported features.
解決方法
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
説明
Syntax error, command unrecognized. The server could not parse the command. This may also be sent when the command line is too long.
このコードが表示される場合
When you send a malformed or misspelled command, or a command the server does not recognize at all.
解決方法
Check the command spelling and syntax. Use HELP to see the list of supported commands on this server.
主な違い
211 is a 2xx Positive Completion response, while 500 is a 5xx Permanent Negative response.
FTP 211: System status or system help reply. The server provides information about its current status or available features.
FTP 500: Syntax error, command unrecognized. The server could not parse the command. This may also be sent when the command line is too long.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
You encounter 500 when when you send a malformed or misspelled command, or a command the server does not recognize at all.
どちらをいつ使うか
For 211 (System Status): No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state. For 500 (Syntax Error): Check the command spelling and syntax. Use HELP to see the list of supported commands on this server.