Virtual users who create vsftp servers in linux

In linux, the virtual user who creates a vsftp server-general Linux technology-Linux technology and application information. For more information, see the following. 1. Install the db4-utils-4 .. 29-10.e15.i386.rpm package (available on the second disc)
Rpm-ivh db4-utils-4 .. 29-10.e15.i386.rpm

2. Create an account and password for storing virtual users (odd behavior accounts and even behavior passwords)
Vim virtual.txt

3. generate an account database in db format recognized by pam (generate a login. db database)
Db_load-T-t hash-f/etc/vsftpd/virtual.txt login. db

4. For the sake of security, change the database file to be read and written only by root.
Chmod 700 login. db

5. Create a testpam file under the/etc/pam. d directory (this file is used for pam Authentication and can be written as needed)
Vim/etc/pam. d/testpam

6. Add the following two commands to the testpam file (Database login should not contain suffix. db)
Auth required/lib/security/pam_userdb.so db =/etc/vsftpd/login
Account required/lib/security/pam_userdb.so db =/etc/vsftpd/login

7. Create a local user. Because you want to map the virtual user to this local user, this user sets it as not logged on.
Useradd-d/home/xuni-s/sbin/nologin xuni

8. Configure the vsftpd main file/etc/vsftpd. conf, and add the following two commands.
Guest_enable = YES
Guest_username = xuni

9. Restart the vsftp service.
/Etc/init. d/vsftpd restart

10. Success !!!