FTP 150 File Status OK vs 500 Syntax Error
FTP 150 (File Status OK) is a 1xx Positive Preliminary response, while 500 (Syntax Error) is a 5xx Permanent Negative response. 150 indicates that the file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer. 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.
描述
The file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer.
何时出现
Right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
如何修复
No fix needed — this means the transfer is about to start. If the transfer stalls after this reply, check firewall rules blocking the data connection.
描述
Syntax error, command unrecognized. The server could not parse the command. This may also be sent when the command line is too long.
何时出现
When you send a malformed or misspelled command, or a command the server does not recognize at all.
如何修复
Check the command spelling and syntax. Use HELP to see the list of supported commands on this server.
主要区别
150 is a 1xx Positive Preliminary response, while 500 is a 5xx Permanent Negative response.
FTP 150: The file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer.
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 150 when right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
You encounter 500 when when you send a malformed or misspelled command, or a command the server does not recognize at all.
何时使用哪个
For 150 (File Status OK): No fix needed — this means the transfer is about to start. If the transfer stalls after this reply, check firewall rules blocking the data connection. For 500 (Syntax Error): Check the command spelling and syntax. Use HELP to see the list of supported commands on this server.