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Re: tab completion for ssh using FQDN

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From: Grant Taylor <gtaylor@xxxxxxxxxxxxxxxxxx>
To: zsh-users@xxxxxxx
Subject: Re: tab completion for ssh using FQDN
Date: Wed, 17 Jul 2019 14:35:57 -0600
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On 7/17/19 1:41 PM, TJ Luoma wrote:

I have several hosts defined in ~/.ssh/config like so:

Host myhost
        HostName myhost.luo.ma
        User myuser
        Port 5555
Something changed, because now when I type "ssh my[tab]" I get "sshmyhost.luo.ma" instead of "ssh myhost" which then fails because it isn'tusing the port specified in ~/.ssh/config.


Tweak your Host entry to include the FQDN, e.g.:

Host myhost.luo.ma myhost

I don't think the order matters. I personally like to put the FQDNfirst and then aliases after. (I pattern off of the hosts file.)

I _think_ it has to do with the ~/.ssh/known_hosts file, because if Idelete the entry from that file, tab completion seems to work as I expect.
I've looked around for a solution, and it appears that if I add this line:

        HostKeyAlias myhost
then the short hostname gets uses for the known_hosts file, but I'm notsure if that's a "good" solution or not.

I think that's functionally (part of) defining a new host by thealternate name and recognizing the alternate name's host key.


I'd suggest trying adding aliases to the Host entry, as described above.

I've done things like this:

Host FQDN alias project<#>-db customer<#>-db current-problem-child

The project<#>-db is nice so that I can easily ssh into a project's DBserver without needing to mentally translate to the host name. I canliterally do the following:


ssh project815-db

Is there a way to tell zsh to only do tab-completion for ssh out of~/.ssh/config and ignore ~/.ssh/known_hosts ?

I'm sure there is a way. I don't know what it is. I've not dealt withthis issue in about 6 years.




--
Grant. . . .
unix || die

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References:
- tab completion for ssh using FQDN
  - From: TJ Luoma

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