An Instance of SSH

Reccently, I find a chance to rent servers from GCP. And I try to connect my server using SSH locally. Through I had used SSH before when I using git to push my code to github, I do not understand how it works. Here is now what I am trying to make sense.

How I connect my server

• generate public key and private key in ~/.ssh/:

~$ ssh-keygen -t rsa -f ~/.ssh/gcloud -C chao

where gcloud is the name of generated keys and chao is the user name to log in.

• Copy the content of gcloud.pub file to the GCP server.

• Then, we can use local terminal to log in GCP server:

~$ ssh -v -i ~/.ssh/gcloud chao@IPOFSERVER

where -v is used to show debug message and -i is used to select a identity file. chao is the name of user.

What is SSH(Secure Shell)

this blog and this page say that SSH is a kind of cryptographic network protocol for cryptographically logon between computers.

We can find SSH uses public-key cryptography like https.