ssh autocomplete -- where do the hosts come from?

[clarkritchie]

When I type ssh the list of hosts that are available for me to autocomplete includes some very old systems I once used, some as far back as 10 years ago! I've had numerous new computers since then and simply cannot reason how how those are displayed. I'm on OS/X and have checked my Keychain thinking that somehow they came from there via an old iCloud account maybe but I can't find them anywhere. Any thoughts? I'd like to purge them. Thanks!

[marlonrichert]

On macOS, the _hosts function of Zsh's completion system gets hosts

• from /etc/hosts and
• from ~/.ssh/known_hosts.

You can override this behavior

• with zstyle ':completion:*:hosts' hosts <hostname> ..., which overrides all of the above, or
• with zstyle ':completion:*:hosts' known-hosts-files <filepath> ..., which overrides only the second point above.