说明：基于本地用户 nginx 的虚拟FTP用户的 vsftpd 配置。
yum install vsftpd 之后：
清空 vsftpd.conf，写入以下内容：
listen=YES
ftpd_banner=Technical-Support:QQ:252872160 Email:root@upall.cn
anonymous_enable=NO
local_enable=YES
local_umask=022
guest_enable=YES
guest_username=nginx
userlist_enable=YES
user_config_dir=/etc/vsftpd/vusers
dirmessage_enable=YES
xferlog_enable=YES
xferlog_std_format=YES
pam_service_name=vsftpd
connect_from_port_20=YES
tcp_wrappers=YES
pasv_enable=YES
pasv_min_port=5000
pasv_max_port=5500
FTP帐号的权限，文件名是FTP帐号：/etc/vsftpd/vusers/ftpUser
local_root=/data/web/ftpUser
anon_umask=077
write_enable=YES
anon_world_readable_only=NO
anon_upload_enable=YES
anon_mkdir_write_enable=YES
anon_other_write_enable=YES
FTP帐号：/etc/vsftpd/vusers.txt
ftpUser
ftpPassword
用于添加FTP帐号的脚本：/etc/vsftpd/makeFtpDb.sh
#!/bin/bash
db_load -T -t hash -f /etc/vsftpd/vusers.txt /etc/vsftpd/vusers.db
chmod 600 /etc/vsftpd/vusers.db
./makeFtpDb.sh 执行后会生成 vusers.db
全部注释，只添加下边的两行：/etc/pam.d/vsftpd
##%PAM-1.0
#session optional pam_keyinit.so force revoke
#auth required pam_listfile.so item=user sense=deny file=/etc/vsftpd
#auth required pam_shells.so
#auth include password-auth
#account include password-auth
#session required pam_loginuid.so
#session include password-auth
auth required /lib/security/pam_userdb.so db=/etc/vsftpd/vusers
account required /lib/security/pam_userdb.so db=/etc/vsftpd/vusers