110 Restart marker reply. In this case, the text is exact and not left to the particular implementation; it must read: MARK yyyy = mmmm where yyyy is User-process data stream marker, and mmmm server\'s equivalent marker (note the spaces between markers and "=").
120 Service ready in nnn minutes.
125 Data connection already open; transfer starting.
150 File status okay; about to open data connection.

200 Command okay.
202 Command not implemented, superfluous at this site.
211 System status, or system help reply.
212 Directory status.
213 File status.
214 Help message.On how to use the server or the meaning of a particular non-standard command. This reply is useful only to the human user.
215 NAME system type. Where NAME is an official system name from the list in the Assigned Numbers document.
220 Service ready for new user.
221 Service closing control connection.
225 Data connection open; no transfer in progress.
226 Closing data connection. Requested file action successful (for example, file transfer or file abort).
227 Entering Passive Mode (h1,h2,h3,h4,p1,p2).
230 User logged in, proceed. Logged out if appropriate.
250 Requested file action okay, completed.
257 "PATHNAME" created.

331 User name okay, need password.
332 Need account for login.
350 Requested file action pending further information

421 Service not available, closing control connection.This may be a reply to any command if the service knows it must shut down.
425 Can\'t open data connection.
426 Connection closed; transfer aborted.
450 Requested file action not taken.
451 Requested action aborted. Local error in processing.
452 Requested action not taken. Insufficient storage space in system.File unavailable (e.g., file busy).

500 Syntax error, command unrecognized. This may include errors such as command line too long.
501 Syntax error in parameters or arguments.
502 Command not implemented.
503 Bad sequence of commands.
504 Command not implemented for that parameter.
530 Not logged in.
532 Need account for storing files.
550 Requested action not taken. File unavailable (e.g., file not found, no access).
551 Requested action aborted. Page type unknown.
552 Requested file action aborted. Exceeded storage allocation (for current directory or dataset).
553 Requested action not taken. File name not allowed
110
重新启动标记应答。在这种情况下文本是确定的，它必须是：MARK yyyy=mmmm，其中yyyy是用户进程数据流标记，mmmm是服务器标记。

120
服务在nnn分钟内准备好

125
数据连接已打开，准备传送

150
文件状态良好，打开数据连接

200
命令成功

202
命令未实现

211
系统状态或系统帮助响应

212
目录状态

213
文件状态

214
帮助信息，信息仅对人类用户有用

215
名字系统类型

220
对新用户服务准备好

221
服务关闭控制连接，可以退出登录

225
数据连接打开，无传输正在进行

226
关闭数据连接，请求的文件操作成功

227
进入被动模式

230
用户登录

250
请求的文件操作完成

257
创建"PATHNAME"

331
用户名正确，需要口令

332
登录时需要帐户信息

350
请求的文件操作需要进一步命令

421
不能提供服务，关闭控制连接

425
不能打开数据连接

426
关闭连接，中止传输

450
请求的文件操作未执行

451
中止请求的操作：有本地错误

452
未执行请求的操作：系统存储空间不足

500
格式错误，命令不可识别

501
参数语法错误

502
命令未实现

503
命令顺序错误

504
此参数下的命令功能未实现

530
未登录

532
存储文件需要帐户信息

550
未执行请求的操作

551
请求操作中止：页类型未知

552
请求的文件操作中止，存储分配溢出

553
未执行请求的操作：文件名不合法