Common FTP status codes and their descriptions

　　　　
　　FTP in our site and website maintenance process is indispensable to one of the most common tools, as well as building a Web server environment, as we build stations, often also need to configure the FTP server. And in the daily Web site maintenance process using FTP, theFTP server will also be corresponding operation return status code hint, here is the common FTP status code and its corresponding instructions, easy to understand and query.
　　
150-FTP uses two ports: 21 for sending commands, and 20 for sending data. Status code 150 indicates that the server is ready to open a new connection on port 20 and send some data.
　　
226-The command opens a data connection on port 20 to perform operations, such as transferring files. The operation completed successfully and the data connection is closed.
　　
230-The status code is displayed after the client sends the correct password. It indicates that the user has successfully logged on.
　　
331-The status code is displayed after the client sends the user name. The status code is displayed regardless of whether the provided user name is a valid account in the system.
　　
426-The command opens the data connection to perform the operation, but the operation has been canceled and the data connection is closed.
　　
530-The status code indicates that the user cannot log on because the user name and password combination is not valid. If you are logged on with a user account, you might type an incorrect user name or password, or you may choose to allow only anonymous access. If you log on with an anonymous account, the configuration of IIS may deny anonymous access.
　　
550-The command was not executed because the specified file is not available. For example, the file you want to get does not exist, or you try to put the file into a directory where you do not have write permission.
　　
In the use of FTP, we also often encounter FTP connection, or FTP can not upload, and so on, we need to be able to understand the status of the FTP return code meaning, the only way to solve the problem of FTP can not link.

Original address: http://vps.zzidc.com/ftp/550.html

Common FTP status codes and their descriptions