I have made o0ne directory with root permission /backups

Now i want that i make one ftp user so that he can access that folder to download all the backups.
I know how to give permisions but i don't know to make ftp user and assign him that directory

so
1. you want the ftpuser to download something via ftp into /backups? or
2. you want the ftpuser to do an ftp upload to your machine's /backups directory?

if its 2 then:

1. set /backups as ftpuser's home directory (man usermod/man chown)
2. jail the user to /backups (meaning user can only access /backups
if using vsftpd, you can edit /etc/vsftpd/vsftpd.conf and set the ff:

chroot_list_enable=YES
chroot_local_user=YES

3. if using selinux:

chcon -t public_content_rw_t /backups/
setsebool -P ftp_home_dir on

so you can do an ftp write to /backups.

and that should be ok after restarting vsftpd.

I am using centOS 5.3 . Mine is case 1 that use can only download from backups.

I have pureFTPd installed as ftp server