1.安裝
2.vsftpd的環境
3.一些重要的概念以及操作
4.自己環境下vsftp的功能，以及配置。下面主要說說自己的配置，順帶說明一些功能。
# 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?
# 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=YES #是否允許匿名用戶登錄
#
# Uncomment this to allow local users to log in.
local_enable=YES #是否允許本地用戶登錄，啥是本地用戶？上面有說到了。。。
#
# Uncomment (look up to dictionary) this to enable any form of FTP write command.
write_enable=YES #寫入允許，必須有這個，才能上傳啊
#
# 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 #這個的意思是本地用戶上傳的文件權限，022=777 077=755。
#
# 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=NO #是否允許匿名用戶上傳
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
anon_mkdir_write_enable=NO #是否允許匿名用戶創建文件夾
no_anon_password=YES #匿名用戶登錄時，忽略密碼檢查
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES #顯示文件夾信息，即是，一個用戶進入某一文件目錄時，會顯示你事先寫好的一些提示信息
#
# If enabled, vsftpd will display directory listings with the time
# in
# times returned by the MDTM FTP command are also affected by this
# option.
use_localtime=YES
#
# Activate logging of uploads/downloads.
xferlog_enable=YES #開啟日志記錄功能
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES #指定FTP的數據端口
#
# 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 #所有匿名用戶上傳的文件的所有者會變成“whoever”
#
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/vsftpd.log #設置日志記錄文件的位置，默認就好
#
# 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 #是否使用標准的日志記錄文件格式，主要用於一些軟件的查看，不用理會
#
# You may change the default value for timing out an idle session.
idle_session_timeout=600 #設定空閒連接時間，如果一個連結無操作，600秒後斷開
#
# You may change the default value for timing out a data connection.
data_connection_timeout=120 #數據連結超時設定，120秒內無數據傳輸，斷開
#
# 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=this is wc's ftp,which has been testing #歡迎信息
#
# 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.
# the possible risks in this before using chroot_local_user or
# chroot_list_enable below.
#chroot_local_user=YES #限制本地用戶的目錄，我沒有使用。
#
# 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().
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
#
# Debian customization
#
# Some of vsftpd's settings don't fit the Debian filesystem layout by
# default.
#
# This option should be the name of a directory which is empty.
# 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/private/vsftpd.pem
local_root=/home/ftp #本地用戶登錄時候進入的目錄
max_clients=100 #最多允許的客戶端
