This is the portable version of OpenSSH, a free implementation of the Secure Shell protocol as specified by the IETF secsh working group. . Ssh (Secure Shell) is a program for logging into a remote machine and for executing commands on a remote machine. It provides secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. It can be used to provide applications with a secure communication channel. . This package provides the ssh, scp and sftp clients, the ssh-agent and ssh-add programs to make public key authentication more convenient, and the ssh-keygen, ssh-keyscan, ssh-copy-id and ssh-argv0 utilities. . In some countries it may be illegal to use any encryption at all without a special permit. . ssh replaces the insecure rsh, rcp and rlogin programs, which are obsolete for most purposes.