Linux Beginner

What is SSH (Secure Shell)?

A cryptographic network protocol for secure remote login and command execution over an unsecured network.

SSH provides encrypted communication between two computers. It replaces insecure protocols like Telnet and rlogin. SSH uses public-key cryptography for authentication and symmetric encryption for data transfer.

Common uses include remote server management, file transfer (via SCP/SFTP), port forwarding, and tunneling. The default port is 22.

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A command to change file and directory access permissions using numeric or symbolic notation.

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A command-line tool for querying and viewing logs collected by systemd's journal logging system.

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What is SSH (Secure Shell)?

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