SSH (Secure Shell)

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Protocol for remote access to the system, which is a secure replacement for TELNET. Uses cryptographic authentication to confirm a user's identity and encrypts any connection between two computers. The most ominous version of a package that uses SSH called OpenSSH. Is a free open source version.

The main components of the package SSH on UNIX systems as pipeline server daemon sshd, uses TCP port 22 and two clients: ssh is designed for remote registration and scp for copying files. There are also clients on the Windows platform as free (Putty, Fresh Free FiSSH) and commercial (Secure CRT).

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