Bsd updating motd
-b bits Specifies the number of bits in the ephemeral protocol version 1 server key (default 1024).
The connection parameters are supplied as keyword=value pairs. All are required and may be supplied in any order, either with multiple -C options or as a comma-separated list. The server sends verbose debug output to the system log, and does not put itself in the background.-D' When this option is specified, sshd will not detach and does not become a daemon. The server also will not fork and will only process one connection. -e' When this option is specified, sshd will send the output to the standard error instead of the system log.This option is only intended for debugging for the server. -f config_file Specifies the name of the configuration file. sshd refuses to start if there is no configuration file.-g login_grace_time Gives the grace time for clients to authenticate themselves (default 120 seconds).If the client fails to authenticate the user within this many seconds, the server disconnects and exits. -h host_key_file Specifies a file from which a host key is read.This option must be given if sshd is not run as root (as the normal host key files are normally not readable by anyone but root).
The default is /etc/ssh/ssh_host_key for protocol version 1, and /etc/ssh/ssh_host_rsa_key and /etc/ssh/ssh_host_dsa_key for protocol version 2.
It is possible to have multiple host key files for the different protocol versions and host key algorithms.
sshd (Open SSH Daemon) is the daemon program for ssh(1). It forks a new daemon for each incoming connection.
Together these programs replace rlogin(1) and rsh(1), and provide secure encrypted communications between two untrusted hosts over an insecure network. The forked daemons handle key exchange, encryption, authentication, command execution, and data exchange.
sshd can be configured using command-line options or a configuration file (by default sshd_config(5)); command-line options override values specified in the configuration file.
sshd rereads its configuration file when it receives a hangup signal, SIGHUP, by executing itself with the name and options it was started with, e.g. The options are as follows: -6' Forces sshd to use IPv6 addresses only.