OpenSSH:

 
  

   ...

    OpenSSH

   OpenSSH

   :  ssh  scp

  sshd:  OpenSSH

   :   sshd

   :    

   

     

OpenSSH        , 
 telnet, rep, rsh/rshd, riogin/rlogind  ftp/ftpd.    
 ,  OpenSSH   ,  ,  
 ,    ,  -
    .

       OpenSSH:

scp                (  ).

sftp                   (-
  ftp).

ssh                  .

sshd           OpenSSH (  ).

ssh-keygen     RSA  DSA   /.