Secure Shell (SSH)

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Secure Shell (SSH) (1995) is a cryptographic network protocol for connecting to ssh network services providing encrypted communication and authentication. Most popular implementation is open source OpenSSH.

OpenSSH includes the following binaries:

  • ssh, ssh client to connect using Secure Shell protocol
  • scp, a replacement for obsoleted rcp
  • sftp, a replacement for not encrypted ftp
  • sshd, the SSH server daemon
  • ssh-keygen, a tool to inspect and generate the RSA, DSA and Elliptic Curve keys that are used for user and host authentication
  • ssh-agent
  • ssh-add
  • ssh-keyscan, to scan a list of hosts and collects their public keys
  • ssh-copy-id, to copy local keys to remote machine.

Ssh clients:

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