Simple definition
An encrypted protocol used primarily to administer remote systems.
Technical definition
Secure Shell provides authentication, remote control, tunnels and secure transfers, usually on TCP 22.
What is it used for ?
Administer Linux servers or network equipment without exposing a clear session.
Practical example
An administrator can use ssh admin@server to open a shell-sat.
Common issues
- Low password
- Unprotected private key
- Port SSH unnecessary exposure to the Internet
Related terms
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.