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19th chunk of `ssh.man`
248c100bd796d02abc34e222e5bad1cc0a0bb9e885a03c680000000100000d01
           used for host‐based authentication.

       /etc/ssh/ssh_known_hosts
               Systemwide list of known host keys.  This file  should  be  pre‐
               pared  by  the  system  administrator to contain the public host
               keys of all machines in the organization.  It should  be  world‐
               readable.  See sshd(8) for further details of the format of this
               file.

       /etc/ssh/sshrc
               Commands in this file are executed by ssh when the user logs in,
               just  before  the user’s shell (or command) is started.  See the
               sshd(8) manual page for more information.

EXIT STATUS
       ssh exits with the exit status of the remote command or with 255  if  an
       error occurred.

SEE ALSO
       scp(1),  sftp(1), ssh‐add(1), ssh‐agent(1), ssh‐argv0(1), ssh‐keygen(1),
       ssh‐keyscan(1), tun(4), ssh_config(5), ssh‐keysign(8), sshd(8)

STANDARDS
       S. Lehtinen and C. Lonvick, The Secure  Shell  (SSH)  Protocol  Assigned
       Numbers, RFC 4250, January 2006.

       T.  Ylonen and C. Lonvick, The Secure Shell (SSH) Protocol Architecture,
       RFC 4251, January 2006.

       T.  Ylonen  and  C.  Lonvick,  The  Secure  Shell  (SSH)  Authentication
       Protocol, RFC 4252, January 2006.

       T.  Ylonen  and  C.  Lonvick,  The  Secure  Shell  (SSH) Transport Layer
       Protocol, RFC 4253, January 2006.

       T. Ylonen and C. Lonvick, The Secure Shell  (SSH)  Connection  Protocol,
       RFC 4254, January 2006.

       J.  Schlyter  and W. Griffin, Using DNS to Securely Publish Secure Shell
       (SSH) Key Fingerprints, RFC 4255, January 2006.

       F. Cusack and M. Forssen, Generic Message  Exchange  Authentication  for
       the Secure Shell Protocol (SSH), RFC 4256, January 2006.

       J.  Galbraith  and  P.  Remaker,  The Secure Shell (SSH) Session Channel
       Break Extension, RFC 4335, January 2006.

       M. Bellare,  T.  Kohno,  and  C.  Namprempre,  The  Secure  Shell  (SSH)
       Transport Layer Encryption Modes, RFC 4344, January 2006.

       B.  Harris,  Improved Arcfour Modes for the Secure Shell (SSH) Transport
       Layer Protocol, RFC 4345, January 2006.

       M. Friedl, N. Provos, and W. Simpson, Diffie‐Hellman Group Exchange  for
       the Secure Shell (SSH) Transport Layer Protocol, RFC 4419, March 2006.

       J.  Galbraith  and  R.  Thayer,  The  Secure Shell (SSH) Public Key File
       Format, RFC 4716, November 2006.

       D. Stebila and J. Green, Elliptic Curve  Algorithm  Integration  in  the
       Secure Shell Transport Layer, RFC 5656, December 2009.

       A.  Perrig  and  D. Song, Hash Visualization: a New Technique to improve
       Real‐World  Security,  1999,  International  Workshop  on  Cryptographic
       Techniques and E‐Commerce (CrypTEC ’99).

AUTHORS
       OpenSSH  is  a derivative of the original and free ssh 1.2.12 release by
       Tatu Ylonen.  Aaron Campbell, Bob Beck,  Markus  Friedl,  Niels  Provos,
       Theo  de  Raadt  and Dug Song removed many bugs, re‐added newer features
       and created OpenSSH.  Markus Friedl contributed the support for SSH pro‐
       tocol versions 1.5 and 2.0.

Debian                         November 28, 2022                         SSH(1)
Title: SSH Configuration Files, Exit Status, References, Standards, and Authors
Summary
This section details /etc/ssh/ssh_known_hosts (system-wide known host keys) and /etc/ssh/sshrc (commands executed on login). It specifies the ssh exit status and lists related utilities. It also references the relevant RFC standards for SSH protocols and cites the authors of OpenSSH and its original version.