不允許匿名訪問，因為我的機器不想讓誰都能登錄上來，隨便獲取文件，
需要鎖定壹個目錄，因為在家裏，我需要給媳婦下載壹些電影 韓劇之類的東西，媳婦會來我機器下載，但是我不想讓他隨意操作我的東西。
萬壹刪除我的配置文件，我就慘了（吐槽壹下韓劇：媳婦問我，妳都沒看過韓劇怎麽知道它不好看呢，我說：我沒吃過屎 但是知道它壹定不好吃！）
另外，需要本機也能訪問，因為我要做壹些關於FTP的測試。
不單獨建立FTP用戶，FTP也使用ubuntu桌面的用戶進行登錄和操作，
我還不希望FTP開始啟動。
好了 我們開始安裝，很簡單。
sudo apt-get install vsftpd
30秒內估計就能安裝完。
下面開始配置：
首先備份配置文件。
linuxidc@ubuntu:/etc/init$ cd /etc/
linuxidc@ubuntu:/etc$ sudo cp vsftpd.conf vsftpd.conf.old
接下來就是開始配置了，
咱們就針對需求來：
1. 不允許匿名訪問，因為我的機器不想讓誰都能登錄上來，隨便獲取文件，
配置如下：
23 anonymous_enable=NO
2.需要鎖定壹個目錄，因為在家裏，我需要給媳婦下載壹些電影 韓劇之類的東西，
媳婦會來我機器下載，但是我不想讓他隨意操作我的東西。
萬壹刪除我的配置文件，我就慘了
配置如下：
152 local_root=/home/linuxidc/公***的/FTP***享文件
備註：[FTP***享文件] 這個文件夾是我新建出來的
另外，需要本機也能訪問，因為我要做壹些關於FTP的測試。
配置如下：
26 local_enable=YES
不單獨建立FTP用戶，FTP也使用ubuntu桌面的用戶進行登錄和操作，
配置如下：
120 #chroot_local_user=YES
121 chroot_list_enable=YES
122 # (default follows)
123 chroot_list_file=/etc/vsftpd.chroot_list
這裏需要/etc/vsftpd.chroot_list 這個文件，如果沒有請新建：
sudo gedit /etc/vsftpd.chroot_list
內容如下（例如我桌面的用戶名為linuxidc）：
duoduo
其實就是把妳的用戶名寫進去
我還不希望FTP開始啟動。 壹會單獨說！
貼出我的配置文件。
# Example config file /etc/vsftpd.conf
#
# The default compiled in settings are fairly paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
# Please see vsftpd.conf.5 for all compiled in defaults.
#
# READ THIS: This example file is NOT an exhaustive list of vsftpd options.
# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's
# capabilities.
#
#
# Run standalone? vsftpd can run either from an inetd or as a standalone
# daemon started from an initscript.
listen=YES
#
# Run standalone with IPv6?
# Like the listen parameter, except vsftpd will listen on an IPv6 socket
# instead of an IPv4 one. This parameter and the listen parameter are mutually
# exclusive.
#listen_ipv6=YES
#
# Allow anonymous FTP? (Disabled by default)
anonymous_enable=NO
#
# Uncomment this to allow local users to log in.
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
#local_umask=022
#
# Uncomment this to allow the anonymous FTP user to upload files. This only
# has an effect if the above global write enable is activated. Also, you will
# obviously need to create a directory writable by the FTP user.
#anon_upload_enable=YES
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES
#
# If enabled, vsftpd will display directory listings with the time
# in your local time zone. The default is to display GMT. The
# times returned by the MDTM FTP command are also affected by this
# option.
use_localtime=YES
#
# Activate logging of uploads/downloads.
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES
#
# If you want, you can arrange for uploaded anonymous files to be owned by
# a different user. Note! Using "root" for uploaded files is not
# recommended!
#chown_uploads=YES
#chown_username=whoever
#
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/vsftpd.log
#
# If you want, you can have your log file in standard ftpd xferlog format.
# Note that the default log file location is /var/log/xferlog in this case.
#xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
#
# It is recommended that you define on your system a unique user which the
# ftp server can use as a totally isolated and unprivileged user.
#nopriv_user=ftpsecure
#
# Enable this and the server will recognise asynchronous ABOR requests. Not
# recommended for security (the code is non-trivial). Not enabling it,
# however, may confuse older FTP clients.
#async_abor_enable=YES
#
# By default the server will pretend to allow ASCII mode but in fact ignore
# the request. Turn on the below options to have the server actually do ASCII
# mangling on files when in ASCII mode.
# Beware that on some FTP servers, ASCII support allows a denial of service
# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd
# predicted this attack and has always been safe, reporting the size of the
# raw file.
# ASCII mangling is a horrible feature of the protocol.
#ascii_upload_enable=YES
#ascii_download_enable=YES
#
# You may fully customise the login banner string:
ftpd_banner=Welcome to linuxidc's FTP service.
#
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
# (default follows)
#banned_email_file=/etc/vsftpd.banned_emails
#
# You may restrict local users to their home directories. See the FAQ for
# the possible risks in this before using chroot_local_user or
# chroot_list_enable below.
#chroot_local_user=YES
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that
# the user does not have write access to the top level directory within the
# chroot)
#chroot_local_user=YES
chroot_list_enable=YES
# (default follows)
chroot_list_file=/etc/vsftpd.chroot_list
#
# You may activate the "-R" option to the builtin ls. This is disabled by
# default to avoid remote users being able to cause excessive I/O on large
# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
# the presence of the "-R" option, so there is a strong case for enabling it.
#ls_recurse_enable=YES
#
# Customization
#
# Some of vsftpd's settings don't fit the filesystem layout by
# default.
#
# This option should be the name of a directory which is empty. Also, the
# directory should not be writable by the ftp user. This directory is used
# as a secure chroot() jail at times vsftpd does not require filesystem
# access.
secure_chroot_dir=/var/run/vsftpd/empty
#
# This string is the name of the PAM service vsftpd will use.
pam_service_name=vsftpd
#
# This option specifies the location of the RSA certificate to use for SSL
# encrypted connections.
rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
# This option specifies the location of the RSA key to use for SSL
# encrypted connections.
rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
#
local_root=/home/linuxidc/公***的/FTP***享文件
現在可以重啟FTP了。
linuxidc@ubuntu:/etc$ sudo service vsftpd restart
vsftpd stop/waiting
vsftpd start/running, process 303
OK 看到這些 證明配置文件沒有問題，FTP啟動了
下面直接訪問FTP 看看：
linuxidc@ubuntu:/etc$ ftp 127.0.0.1
Connected to 127.0.0.1.
Welcome to linuxidc's FTP service.
Name (127.0.0.1:linuxidc): duoduo
Please specify the password.
Password:
OOPS: vsftpd: refusing to run with writable root inside chroot()
Login failed.
Service not available, remote server has closed connection
ftp>
居然報了壹個500的錯誤
vsftpd: refusing to run with writable root inside chroot()
。其實這裏是需要特殊說明的，原因出在這裏
120 #chroot_local_user=YES
121 chroot_list_enable=YES
122 # (default follows)
123 chroot_list_file=/etc/vsftpd.chroot_list
我們用
chroot_list_enable=YES 和 chroot_list_file=/etc/vsftpd.chroot_list配合使用，使得只有在vsftpd.chroot_list中配置的用戶才能登錄FTP。
對於這要的配置有壹個特殊的要求，就是vsftpd.chroot_list裏面配置的用戶，對於前面local_root配置的目錄不能有寫的權限！
也就是/home/linuxidc/公***的/FTP***享文件 這個文件夾 對於linuxidc這個用戶不能有寫的權限，
我們為了額操作方便可以這麽做：
sudo chown -R root:root /home/linuxidc/公***的/FTP***享文件/
這樣，linuxidc這個用戶對於/home/linuxidc/公***的/FTP***享文件沒有寫權限了，
現在重啟FTP 重新登錄看看：
linuxidc@ubuntu:/etc$ ftp 127.0.0.1
Connected to 127.0.0.1.
Welcome to linuxidc's FTP service.
Name (127.0.0.1:linuxidc): duoduo
Please specify the password.
Password:
Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp>
OK FTP 好了 可以登錄了
但是我剛才 sudo chown -R root:root /home/linuxidc/公***的/FTP***享文件/ 這個操作
還帶來了壹個麻煩。就是FTP***享文件在我桌面登錄時，不能任意復制粘貼操作文件了，但是我還要必須保持linuxidc用戶對[FTP***享文件]
這個文件夾不可寫。這該怎麽辦呢？
其實很簡單，
cd /home/linuxidc/公***的/FTP***享文件
sudo mkdir FTPFILES
sudo chown -R linuxidc:duoduo FTPFILES
這樣 就保持了 FTP***享文件 文件夾linuxidc用戶不可寫，但duoduo用戶用可以在桌面登錄時任意操作文件了，只不過此時的隨意範圍在FTPFILES文件夾範圍呢了。
這樣基本FTP服務基本搭建完成了。
對了 忘記了壹點。就是不讓FTP服務開機啟動。操作如下：
linuxidc@ubuntu:/etc/init$ cd /etc/init/
linuxidc@ubuntu:/etc/init$ sudo cp vsftpd.conf vsftpd.conf.old
編輯配置文件
sudo gedit /etc/init/vsftpd.conf
將#start on runlevel [2345] or net-device-up IFACE!=lo 修改為start on runlevel [345] 如下：
#start on runlevel [2345] or net-device-up IFACE!=lo
start on runlevel [345]
stop on runlevel [!2345]
這次重啟FTP 重啟系統 徹底完成。