Access to Amazon EC2 instances specially the Linux instances are always protected by a private key pair. Private key is only the way to get access to the instance, what if you lost the key? Is your servers lost in black hole? Thankfully nothing is lost you still can access your server, let me show you how can you solve this problem.
In past I tried to setup FTP on Amazon EC2 I personally face some problem in FTP server installation. I found the documentation is very fragmented and definitely lacking some information.
So here is my contribution:
To setup FTP account on amazon EC2 we will use Pure-FTPd a free FTP server. It can be compiled and run on a variety of Unix-like computer operating systems including Linux, OpenBSD, NetBSD, FreeBSD, DragonFly BSD, Solaris, Tru64, Darwin, Irix and HP-UX. It has also been ported to Android.