Linux: SSH Subsystem

sshd reads configuration data from /etc/ssh/sshd_config (or the file specified with -f on the command line). The file contains keyword-argument pairs, one per line. Lines starting with '#' and empty lines are interpreted as comments. Arguments may optionally be enclosed in double quotes in order to represent arguments containing spaces. - Subsystem: Configures an external subsystem (e.g. file transfer daemon). Arguments should be a subsystem name and a command (with optional arguments) to execute upon subsystem request. The command sftp-server implements the 'sftp' file transfer subsystem. Alternately the name 'internal-sftp' implements an in-process 'sftp' server. This may simplify configurations using ChrootDirectory to force a different filesystem root on clients. By default no subsystems are defined. Note that this option applies to protocol version 2 only.