In the Anonymous mode, remote clients can access the FTP server by using the default user account called “anonymous” or “ftp” and sending an email address as the password. In the Authenticated mode a user must have an account and a password. User access to the FTP server directories and files is dependent on the permissions defined for the account used at login. As a general rule, the FTP daemon will hide the root directory of the FTP server and change it to the FTP Home directory. This hides the rest of the file system from remote sessions.
vsftpd - FTP Server Installation
vsftpd is an FTP daemon available in Ubuntu. It is easy to install, set up, and maintain. To install vsftpd you can run the following command:
sudo apt-get install vsftpd
vsftpd - FTP Server Configuration
You can edit the vsftpd configuration file, /etc/vsftpd.conf, to change the default settings. By default only anonymous FTP is allowed. If you wish to disable this option, you should change the following line:
anonymous_enable=YES
to
anonymous_enable=NO
By default, local system users are not allowed to login to FTP server. To change this setting, you should uncomment the following line:
#local_enable=YES
By default, users are allowed to download files from FTP server. They are not allowed to upload files to FTP server. To change this setting, you should uncomment the following line:
#write_enable=YES
Similarly, by default, the anonymous users are not allowed to upload files to FTP server. To change this setting, you should uncomment the following line:
#anon_upload_enable=YES
The configuration file consists of many configuration parameters. The information about each parameter is available in the configuration file. Alternatively, you can refer to the man page, man 5 vsftpd.conf for details of each parameter.
Once you configure vsftpd you can start the daemon. You can run following command to run the vsftpd daemon:
sudo /etc/init.d/vsftpd start
Thanks to http://techgurulive.com/2009/01/06/how-to-install-vsftpd-ftp-server-under-ubuntu/
Blog 
