// Tutorial //

What is SSH?

Published on February 3, 2021 · Updated on February 3, 2021
Default avatar
By Mark Drake
Manager, Developer Education
What is SSH?

Secure Shell — more commonly known as SSH — is a cryptographic network protocol that allows users to securely access one computer from another over an unsecured network.

SSH uses public-key cryptography to authenticate users and machines; a system administrator will add the public key of any user who must access a remote computer to a specific location in its filesystem. On Unix-like systems, authorized public keys are typically stored in the ~/.ssh/authorized_keys file. Any user who presents a private SSH key that matches one of the public keys on the remote machine will be able to access it.

For more educational resources related to SSH, please visit our resources on How To Set Up SSH Keys and How To Use SFTP to Securely Transfer Files with a Remote Server.

Thanks for learning with the DigitalOcean Community. Check out our offerings for compute, storage, networking, and managed databases.

Learn more about us

About the authors
Default avatar
Manager, Developer Education

Technical Writer @ DigitalOcean

Still looking for an answer?

Ask a questionSearch for more help

Was this helpful?
Leave a comment
Leave a comment...

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Try DigitalOcean for free

Click here to Sign up and get $200 of credit to try our products over 60 days!