Secure Shell, explained
SSH provides encrypted remote login and other secure network operations such as file transfer and tunnelling.
- The field
- Technical
- Reading time
- 1 minute
- In this entry
- Meaning · relevance · limits
The meaning
SSH provides encrypted remote login and other secure network operations such as file transfer and tunnelling.
Why it matters
Use verified host keys and strong authentication. Administrative access should be limited to accounts and sources that need it.
The boundary
Encryption does not help if a private key is exposed or you accept an unverified server identity.
Test access before tightening it
An administrator adds an SSH public key for a non-root account and verifies it in a second session before changing authentication settings. Checking the server configuration and keeping a working recovery path prevents a hardening change from becoming a lockout. SSH keys grant access; the private key should remain on the trusted client.
- Verify the server host-key fingerprint and never treat a changed fingerprint as a routine prompt to ignore.
- Validate configuration and test the intended account before disabling another access method.