to install a FTP server send this command in debian:
apt-get install proftpd
I select Standalone 
┌──────────────────────────────────────────────┤ ProFTPd configuration  ├───────────────────────────────────────────────┐
│ ProFTPd can be run either as a service from inetd, or as a standalone server. Each choice has its own benefits. If 	│
│ you have only a few ftp connections per day, it is probably better to run proftp from inetd in order to save 		│
│ resources. 														│
│ 															│
│ On the other hand, if your ftp site is visited frequently, you should rather run proftp as a standalone server 	│
│ (because with inetd, each time a connection is opened, a new process is spawned). 					│
│ 															│
│ Run proftpd from inetd or standalone? 										│
│ 															│
│ inetd 														│
│ standalone 														│
│ 															│
│ 															│
│  															│
│ 															│
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘