SFTP server subsystem
sftp-server [-f log_facility] [-l log_level]
QNX Neutrino
See sftp-server in the NetBSD documentation.
The sftp-server is a program that speaks the server side of the SFTP protocol to stdout and expects client requests from stdin. The sftp-server program isn't intended to be called directly, but from sshd using the Subsystem option.
For more information, see sftp-server in the NetBSD documentation.
NetBSD
/etc/moduli, scp, sftp, ssh, ssh-add, ssh-agent, ssh-keygen, ssh-keyscan, ssh-keysign, ~/.ssh/ssh_config, /etc/ssh/ssh_config, sshd, /etc/ssh/sshd_config in the NetBSD documentation