我在 Ubuntu 12.04.3 LTS 上安装了服务器。我需要安装带 MySQL 身份验证的 Pure-FTPd。我通过输入“apt-get install pure-ftpd-mysql”安装了 pure-FTPd。它已安装。因此，这是我的“/etc/pure-ftpd/pure-ftp.conf”文件：
############################################################
# #
# Configuration file for pure-ftpd wrappers #
# #
############################################################
# If you want to run Pure-FTPd with this configuration
# instead of command-line options, please run the
# following command :
#
# /usr/sbin/pure-config.pl /etc/pure-ftpd/pure-ftpd.conf
#
# Please don't forget to have a look at documentation at
# http://www.pureftpd.org/documentation.shtml for a complete list of
# options.
# Cage in every user in his home directory
ChrootEveryone yes
# Turn on compatibility hacks for broken clients
BrokenClientsCompatibility no
# Maximum number of simultaneous users
MaxClientsNumber 50
# Fork in background
Daemonize yes
# Maximum number of sim clients with the same IP address
MaxClientsPerIP 8
# If you want to log all client commands, set this to "yes".
# This directive can be duplicated to also log server responses.
VerboseLog yes
# List dot-files even when the client doesn't send "-a".
DisplayDotFiles no
# Don't allow authenticated users - have a public anonymous FTP only.
AnonymousOnly no
# Disallow anonymous connections. Only allow authenticated users.
NoAnonymous yes
# Syslog facility (auth, authpriv, daemon, ftp, security, user, local*)
# The default facility is "ftp". "none" disables logging.
SyslogFacility daemon
# Display fortune cookies
# FortunesFile /usr/share/fortune/zippy
# Don't resolve host names in log files. Logs are less verbose, but
# it uses less bandwidth. Set this to "yes" on very busy servers or
# if you don't have a working DNS.
DontResolve yes
# Maximum idle time in minutes (default = 15 minutes)
MaxIdleTime 15
# MySQL configuration file (see README.MySQL)
MySQLConfigFile /etc/pure-ftpd/db/mysql.conf
# 'ls' recursion limits. The first argument is the maximum number of
# files to be displayed. The second one is the max subdirectories depth
LimitRecursion 2000 8
# Are anonymous users allowed to create new directories ?
AnonymousCanCreateDirs no
# If the system is more loaded than the following value,
# anonymous users aren't allowed to download.
MaxLoad 4
# Port range for passive connections replies. - for firewalling.
PassivePortRange 50000:50100
# Disallow downloading of files owned by "ftp", ie.
# files that were uploaded but not validated by a local admin.
AntiWarez no
# File creation mask. <umask for files>:<umask for dirs> .
# 177:077 if you feel paranoid.
Umask 133:022
# Minimum UID for an authenticated user to log in.
MinUID 48
# Do not use the /etc/ftpusers file to disable accounts. We're already
# using MinUID to block users with uid < 500
UseFtpUsers no
# Allow FXP transfers for authenticated users.
AllowUserFXP yes
# Allow anonymous FXP for anonymous and non-anonymous users.
AllowAnonymousFXP no
# Users can't delete/write files beginning with a dot ('.')
# even if they own them. If TrustedGID is enabled, this group
# will have access to dot-files, though.
ProhibitDotFilesWrite no
# Prohibit *reading* of files beginning with a dot (.history, .ssh...)
ProhibitDotFilesRead no
# Never overwrite files. When a file whose name already exist is uploaded,
# it get automatically renamed to file.1, file.2, file.3, ...
AutoRename no
# Disallow anonymous users to upload new files (no = upload is allowed)
AnonymousCantUpload yes
# Create an additional log file with transfers logged in a Apache-like format :
# fw.c9x.org - jedi [13/Dec/1975:19:36:39] "GET /ftp/linux.tar.bz2" 200 21809338
# This log file can then be processed by www traffic analyzers.
AltLog clf:/var/log/pureftpd.log
# Automatically create home directories if they are missing
CreateHomeDir yes
# This option is useful with servers where anonymous upload is
# allowed. As /var/ftp is in /var, it save some space and protect
# the log files. When the partition is more that X percent full,
# new uploads are disallowed.
MaxDiskUsage 90
# Be 'customer proof' : workaround against common customer mistakes like
# 'chmod 0 public_html', that are valid, but that could cause ignorant
# customers to lock their files, and then keep your technical support busy
# with silly issues. If you're sure all your users have some basic Unix
# knowledge, this feature is useless. If you're a hosting service, enable it.
CustomerProof yes
...和我的“/etc/pure-ftpd/db/mysql.conf”文件：
##############################################
# #
# Sample Pure-FTPd Mysql configuration file. #
# See README.MySQL for explanations. #
# #
##############################################
# Optional : MySQL server name or IP. Don't define this for unix sockets.
# MYSQLServer 127.0.0.1
# Optional : MySQL port. Don't define this if a local unix socket is used.
# MYSQLPort 3306
# Optional : define the location of mysql.sock if the server runs on this host.
MYSQLSocket /var/lib/mysql/mysql.sock
# Mandatory : user to bind the server as.
MYSQLUser mybard_joo
# Mandatory : user password. You must have a password.
MYSQLPassword bkmzyfevjd
# Mandatory : database to open.
MYSQLDatabase mybard_joo
# Mandatory : how passwords are stored
# Valid values are : "cleartext", "crypt", "sha1", "md5" and "password"
# ("password" = MySQL password() function)
# You can also use "any" to try "crypt", "sha1", "md5" *and* "password"
MYSQLCrypt md5
# In the following directives, parts of the strings are replaced at
# run-time before performing queries :
#
# \L is replaced by the login of the user trying to authenticate.
# \I is replaced by the IP address the user connected to.
# \P is replaced by the port number the user connected to.
# \R is replaced by the IP address the user connected from.
# \D is replaced by the remote IP address, as a long decimal number.
#
# Very complex queries can be performed using these substitution strings,
# especially for virtual hosting.
# Query to execute in order to fetch the password
#MYSQLGetPW SELECT Password FROM users WHERE User='\L'
MYSQLGetPW SELECT `ftp`.`passwd` AS `Password` FROM `bard__user_list` `u` INNER JOIN `bard__user_ftp` `ftp` ON `ftp`.`id_user`=`u`.`id` WHERE `u`.`login`='\L' AND `ftp`.`enabled`
# Query to execute in order to fetch the system user name or uid
#MYSQLGetUID SELECT Uid FROM users WHERE User='\L'
# Optional : default UID - if set this overrides MYSQLGetUID
MYSQLDefaultUID 48
# Query to execute in order to fetch the system user group or gid
#MYSQLGetGID SELECT Gid FROM users WHERE User='\L'
# Optional : default GID - if set this overrides MYSQLGetGID
MYSQLDefaultGID 502
# Query to execute in order to fetch the home directory
#MYSQLGetDir SELECT Dir FROM users WHERE User='\L'
MYSQLGetDir SELECT CONCAT('/ftp/',`u`.`login`,'/') AS `Dir` FROM `bard__user_list` `u` INNER JOIN `bard__user_ftp` `ftp` ON `ftp`.`id_user`=`u`.`id` WHERE `login`='\L' AND `ftp`.`enabled`=1
# Optional : query to get the maximal number of files
# Pure-FTPd must have been compiled with virtual quotas support.
# MySQLGetQTAFS SELECT QuotaFiles FROM users WHERE User='\L'
# Optional : query to get the maximal disk usage (virtual quotas)
# The number should be in Megabytes.
# Pure-FTPd must have been compiled with virtual quotas support.
# MySQLGetQTASZ SELECT QuotaSize FROM users WHERE User='\L'
# Optional : ratios. The server has to be compiled with ratio support.
# MySQLGetRatioUL SELECT ULRatio FROM users WHERE User='\L'
# MySQLGetRatioDL SELECT DLRatio FROM users WHERE User='\L'
# Optional : bandwidth throttling.
# The server has to be compiled with throttling support.
# Values are in KB/s .
# MySQLGetBandwidthUL SELECT ULBandwidth FROM users WHERE User='\L'
# MySQLGetBandwidthDL SELECT DLBandwidth FROM users WHERE User='\L'
# Enable ~ expansion. NEVER ENABLE THIS BLINDLY UNLESS :
# 1) You know what you are doing.
# 2) Real and virtual users match.
# MySQLForceTildeExpansion 1
# If you're using a transactionnal storage engine, you can enable SQL
# transactions to avoid races. Leave this commented if you are using the
# traditionnal MyIsam engine.
# MySQLTransactions On
一切似乎都很好，但当我尝试登录时，它退出并显示错误：“服务器说：登录验证失败”。我重启了服务器几次，但不起作用... 似乎它没有应用配置文件。
我尝试了这个命令：“/usr/sbin/pure-config.pl /etc/pure-ftpd/pure-ftpd.conf”，但它仍然不起作用：“/usr/sbin/pure-config.pl：没有这样的文件或目录”。
我在“/etc/pure-ftpd/conf”中只有三个文件：ChrootEveryone、CreateHomeDir、MySQLConfigFile。一切似乎都正确。
答案1
抱歉，各位，现在一切都正常了。不知道怎么回事，但在 mysql.conf 文件中，MYSQLCrypt 被设置为明文... 现在，当我将其设置为 md5 时，everethin 似乎都正常了！
答案2
另一个原因可能是pure-ftpd-mysql package根本没有安装。好的，您说您安装了它。但我刚才发现我没有安装它，只有它的配置文件，这些配置文件是在安装过程中由 ISPConfig 创建的。
因此，安装该软件包后，这个问题立即得到了解决：
apt-get install pure-ftpd-mysql
有关更详细的解释和其他可能的原因，请参阅我关于此的博客文章：“如何修复 ISPConfig FTP 登录的“530 登录验证失败”？“。