Create a New SSH Public and Private Key Set

Copy an SSH key to a remote server using ssh-copy-id

SSH into a remote server

Simplify connections with SSH config files

Use scp to securely copy files remotely over SSH

Configure local and remote port forwarding with an SSH tunnel

Use SSH escape sequences and codes

Check and verify SSH fingerprints

Modify server configuration to lock down incoming SSH connections

Monitoring and auditing SSH connection attempts

SSH for Remote Server Authentication

Learn how to generate an SSH private and public key set. We'll also cover what permissions are set on the .ssh folder, as well as what each of the id_rsa and id_rsa.pub keys are and what they do.

https://app.egghead.io/api/v1/lessons/bash-create-a-new-ssh-public-and-private-key-set/subtitles

Instructor: [00:01] SSH keys are used as a very secure method for server authentication. Keys can be easily generated by running the ssh-keygen command. If you then hit enter three times in succession, the keys will be created. Note that this is the most common way of generating SSH keys, and will place your keys in their default locations and create them without a passphrase.

[00:25] SSH keys created are placed within a .ssh directory within your home directory. If you view the contents of this folder, you will see the private and public keys. The private key is id_rsa, and the public key is id_rsa.pub.

[00:45] Note the permissions set on the folder and keys. The .ssh folder and private key are both only readable and writable by the current user, while the public key is readable by any user on the system.

[00:59] Let's check out the private key, id_rsa. You must never give out or display the contents of your private key with anyone. This is your secret, the equivalent of a password. Now look at the public key, id_rsa.pub. Feel free to share your public key with anyone, or any server which you would like to authenticate with.

[01:23] You may also edit the last part of your public key after the space. This is treated as a comment to document which public key this is, and can be helpful when keeping track of many servers using different keys.

Create a New SSH Public and Private Key Set

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SSH for Remote Server Authentication