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Wiktionary

ssh

n. A program and protocol for securely logging in to and running programs on remote machines across a network, with encryption to protect the transferred information and authentication to ensure that the remote machine is the one desired. vb. To use ssh to connect to a remote computer.

Longman Dictionary of Contemporary English

ssh

interjection
EXAMPLES FROM OTHER ENTRIES
Ssh! Be quiet.

Usage examples of "ssh".

Within a few years, all ISPs that have a clue will require ssh logins to shell accounts.