tmate

Tmate is a popular tool used for instant terminal sharing, which enables users to share their terminal session with others in real-time.
This can be very useful for collaborative coding sessions, debugging code together, providing remote support, or simply for showing someone how to use a particular command or tool.
Tmate works over SSH, which means all connections are encrypted and secure.
Additionally, Tmate provides features like access control, user visibility, and read-only session sharing.

Security Considerations
It's important to note that Tmate also comes with some security risks users should be aware of.
One of the main vulnerabilities of Tmate is that it does not provide any password protection by default.
If someone obtains the SSH link to your active Tmate session, they can easily connect to it without authentication.
While the link is difficult to guess, it could be leaked or shared inadvertently.
Another risk is brute-force attacks — if an attacker obtains a partial or expired link, they could attempt automated guessing to hijack the session.
If successful, this could allow remote code execution or data theft.

Alternative: Using Screen with SSH Keys
Some users may prefer to share a terminal using `screen -x` with public/private key authentication and `sudo` access.
This method is more secure because it requires direct access via SSH keys or passwords.
While Tmate supports features like session revocation, viewer tracking, and read-only access,
it’s essential to understand its limitations and apply additional safeguards when using it in sensitive environments.