SSHkommandon

SSHkommandon is a term that refers to commands used with the Secure Shell (SSH) protocol. SSH is a cryptographic network protocol for operating network services securely over an unsecured network. Its most notable applications are remote login and command-line execution.

The most fundamental SSH command is ssh itself, used to establish a connection to a remote server. The basic syntax is ssh username@hostname. For example, ssh [email protected] would attempt to log in as user john to the server example.com. If the server uses a non-standard SSH port, it can be specified using the -p option, like ssh -p 2222 [email protected].

Other common SSH commands include scp and sftp for secure file transfer. scp (secure copy) allows for copying files between local and remote hosts, using syntax similar to the standard cp command. sftp (SSH File Transfer Protocol) provides an interactive file transfer session, akin to FTP but over an encrypted SSH connection.

SSH keys are often used for passwordless authentication. The ssh-keygen command generates public and private key pairs. The public key can then be authorized on the remote server, allowing for secure connections without repeatedly entering a password.

Managing SSH configurations is typically done through the ssh_config file on the client and sshd_config on the server. These files allow for customization of connection parameters, authentication methods, and other security-related settings. Understanding these commands and their associated configurations is essential for secure remote system administration.