Now your FTP server is up and running. It is time to add additional users to FTP server so that they can login into account to upload / download files. To add a user called tom and set the password, enter:
# adduser -c 'FTP USER Tom' -m tom
# passwd tom
Now tom can login using our ftp server. Make sure the following is set in vsftpd.conf
Restart the vftpd:
# service vsftpd restart
However, I recommend setting virtual FTP user account to increase server security.