VSFTPD Virtual User Management Guide

First we assume that you have installed the VSFTPD and have created the following 3 subdirectories under the/HOME/VSFTPD directory

Dbzh1
Dbzh2
Dbzh3

Below, we are going to build 3 virtual users, password is the username and then add "00"

Db1
Db2
Db3

Makes

User DB1 's home directory is DBZH1, and only read-only permissions are available under this directory
User DB2 's home directory is DBZH2, and only read-only permissions are available under this directory
User Db3 's home directory is DBZH3 and has all permissions under that directory

Create a text file Loguser.txt

The format is as follows:

user_id
Password&http://www.aliyun.com/zixun/aggregation/37954.html ">NBSP;

So, the contents of our/home/loguser.txt file are

Db1
db100
Db2
db200
Db3
db300

Building a Database

If you've never had a libdb4.6-util before or you don't know what to do, you'll need to execute the following command

sudo apt install db4.6-util

Then we execute

sudo db4.6_load-t-t hash-f/home/loguser.txt/etc/vsftpd_login.db

Finally set the access rights of the database file

sudo chmod 600/etc/vsftpd_login.db

Configuring Pam Files

Edit File/etc/pam.d/vsftpd.vu Add the following to the previous two lines of the original file:

Auth required/lib/security/pam_userdb.so Db=/etc/vsftpd_login
Account Required/lib/security/pam_userdb.so Db=/etc/vsftpd_login

The database Vsftpd_login we established in the previous step is used here

The virtual user we created will be validated using Pam, which is enabled by the statement pam_service_name=vsftpd.vu in the/etc/vsftpd.conf file, which you will discover later.