向一个环境内通过FTP推一个包，其中遇到不能在目标文件夹建立文件和文件夹的麻烦，关闭Passive mode就好了，记录一下。
[root@yw ~]# ftp x.x.x.x
Connected to x.x.x.x.
220 Serv-U FTP Server v6.2 for WinSock ready...
500 'AUTH': command not understood.
500 'AUTH': command not understood.
KERBEROS_V4 rejected as an authentication type
Name (172.16.1.96:root): xxd
331 User name okay, need password.
Password:
230 User logged in, proceed.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> hash
Hash mark printing on (1024 bytes/hash mark).
ftp> put /tmp/CentOS-5.2-i386-bin-DVD.iso
local: /tmp/CentOS-5.2-i386-bin-DVD.iso remote: /tmp/CentOS-5.2-i386-bin-DVD.iso
227 Entering Passive Mode (x.x.x.x,39,37) --主要就是这个模式不让建立文件
550 Permission denied.
ftp> passive
Passive mode off.--关闭
ftp> put /tmp/CentOS-5.2-i386-bin-DVD.iso
local: /tmp/CentOS-5.2-i386-bin-DVD.iso remote: /tmp/CentOS-5.2-i386-bin-DVD.iso
200 PORT Command successful.
550 CentOS-5.2-i386-bin-DVD.iso: Cannot create file. --要进入/tmp才能上传东西
ftp> lcd /tmp
Local directory now /tmp --进入/tmp
ftp> put CentOS-5.2-i386-bin-DVD.iso
local: CentOS-5.2-i386-bin-DVD.iso remote: CentOS-5.2-i386-bin-DVD.iso
200 PORT Command successful.
150 Opening BINARY mode data connection for CentOS-5.2-i386-bin-DVD.iso.
226 Transfer complete.
ftp> quit
421 Connection timed out - closing.