ssh.md

SSH Setup

References

https://www.freecodecamp.org/news/the-ultimate-guide-to-ssh-setting-up-ssh-keys/

Host

Manage Keys

1. ssh-keygen to create a new set of keys
2. Assign keys in a config file e.g. ~/.ssh/conf
3. Only create new keys for new categories of servers, otherwise reuse the keys with conf settings.

Host <host alias>
  HostName <domain of host>
  User <username>
  IdentityFile </path/to/private_rsa_file>
  IdentityiesOnly yes

Manage passwords

1. Make sure ssh-agent is running. execute eval `ssh-agent -s` from the command line.
2. Add the key to the repository with ssh-add.
3. Add the following lines to the config file:

Host *
  AddKeysToAgent yes

Apply keys to guest

copy your keys to your guest:

ssh-copy-id -i ~/.ssh/<rsa key>.pub <username>@<domain/ip>

Error: Warning: the ECDSA host key for '<domain>' differs from the key for the IP address '<ip address>'

Solution: ssh-keygen -R <domain|IP>