Part 1

Vocabulary

• local : your computer
• remote : a different computer, accessible over you network
• user : a user account on a specific computer
• host : a computer that “hosts” user accounts
• login : a username and password for an account on a host
• service : a task that can be provided by a host
• server : a program that “listens” for connections and provides services
• client : program that communicates with a server and requests services

ssh

secure shell is a command that lets you access a shell on a remote host. You need:

• a network connection to the remote host
• a login for the remote host

ssh username@hostname
password:

Part 2

Demo

ssh into a remote machine.

How cool is that?

Part 3

scp

• secure copy lets you copy files to/from remote hosts
• It uses ssh to encrypt the data.

Demo

copy files to/remote machine

Part 4

ssh keys

• ssh keys allow you to setup password-less logins in a secure way.
• makes copying files to and from a remote machine interactively less annoying, but is necessary if we want to do the copy in a script.

Demo

ssh into a remote machine without using a password.

Part 5

ssh for GitHub/Gitlab

We can upload our ssh key to github and fermi.fhsu.edu, so that we can then upload commits without entering a password.