To start an SSH session on a specific port:
$ ssh -p 22222 host
To download a file over SCP on a unique port:
$ scp -P 22222 host:file .
To start an SFTP session on a specific port:
$ sftp -oPort=22222 host
To start an tftp session on a specific port:
$ tftp host 22222
Hashtag Linux userland! Time to break out some port of another nature.
UPDATE: I wrote about SFTP ports seven years ago. I guess my memory is worse than I thought, though at least it hasn’t affected my memory.