vsftp 各种权限设置

例：
1、只能上传。不能下载、删除、重命名。
cmds_allowed＝FEAT,REST,CWD,LIST,MDTM,MKD,NLST,PASS,PASV,PORT,PWD,QUIT,RMD,SIZE,STOR,TYPE,USER,ACCT,APPE,CDUP,HELP,MODE,NOOP,REIN,STAT,STOU,STRU,SYST
对于参数的详细的解释
cmds_allowed=ABOR,ACCT,APPE,CWD,CDUP,DELE,HELP,LIST,MODE,MDTM,MKD,NOOP,NLST,PASS,PASV,PORT,PWD,QUIT,REIN,RETR,RMD,RNFR,RNTO,SITE,SIZE,STOR,STAT,STOU,STRU,SYST,TYPE,USER

# ABOR - abort a file transfer 取消文件传输
# CWD - change working directory 更改目录
# DELE - delete a remote file 删除文件
# LIST - list remote files 列目录
# MDTM - return the modification time of a file 返回文件的更新时间
# MKD - make a remote directory 新建文件夹
# NLST - name list of remote directory
# PASS - send password
# PASV - enter passive mode
# PORT - open a data port 打开一个传输端口
# PWD - print working directory 显示当前工作目录
# QUIT - terminate the connection 退出
# RETR - retrieve a remote file 下载文件
# RMD - remove a remote directory
# RNFR - rename from
# RNTO - rename to
# SITE - site-specific commands
# SIZE - return the size of a file 返回文件大小
# STOR - store a file on the remote host 上传文件
# TYPE - set transfer type
# USER - send username
# less common commands:
# ACCT* - send account information
# APPE - append to a remote file
# CDUP - CWD to the parent of the current directory
# HELP - return help on using the server
# MODE - set transfer mode
# NOOP - do nothing
# REIN* - reinitialize the connection
# STAT - return server status
# STOU - store a file uniquely
# STRU - set file transfer structure
# SYST - return system type 

2、只能下载。不能上传、删除、重命名。write_enable=NO
3、只能上传、删除、重命名。不能下载。download_enable＝NO
4、只能下载、删除、重命名。不能上传。
cmds_allowed=FEAT,REST,CWD,LIST,MDTM,MKD,NLST,PASS,PASV,PORT,PWD,QUIT,RMD,RNFR,RNTO,RETR,DELE,SIZE,TYPE,USER,ACCT,APPE,CDUP,HELP,MODE,NOOP,REIN,STAT,STOU,STRU,SYST