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my goal is to be able to type:

  • srv01.sms and it connects to srv01.anything0.example

  • srv02.mail and it connects to srv02.anything1.example

I know that i can edit my .ssh/config file to do something like this, but i don't want to edit my .ssh/config file for 500 servers

Is there a way to do this? In ssh config? bash aliases?

fabolous05
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  • Possible duplicate: How do I create a command prefix for bash? You want ssh where the other user wants sudo, but the rest seems similar. – Kamil Maciorowski Apr 05 '22 at 08:13
  • I thought it was clear you want to type srv01.sms, but the answer that "really helped you" requires you to type ssh srv01.sms, so I'm confused. Your comment under the answer makes me believe that srv01.smsandmore.example is not really what you want, possibly srv01.andmore.example or something. Ideally the question like yours should state clear requirements and stick to them. You can [edit] (a good step after "sorry that I didn't wrote that"), but remember an edit that invalidates existing answer(s) is not a good thing. Please at least clarify if typing ssh srv01.sms is acceptable. – Kamil Maciorowski Apr 05 '22 at 15:47
  • Depending on what you are trying to do with your ssh connections, you may want to look at using ansible in order to leverage dynamic inventories – Jesusaur Apr 06 '22 at 18:58

1 Answers1

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If you only have very few patterns (sms/mail), but a large number of servers, then you can use the patterns supported by ssh_config

A pattern consists of zero or more non-whitespace characters, ‘*’ (a wildcard that matches zero or more characters), or ‘?’ (a wildcard that matches exactly one character).

(from ssh_config(5)).

along with the %h (the remote hostname) token in the Hostname specification:

Host srv*.sms
    Hostname %handmore.example

Host srv*.mail
    Hostname %handmore.example

Now any attempt to run ssh srv<xyz>.sms will connect to srv<xyz>.smsandmore.example, likewise for .mail.

Wieland
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  • Great answer this really helped me! Sorry that i didn't wrote that in my question but the %h takes the full line. Do you know how it only takes everything that is in front of the . ? – fabolous05 Apr 05 '22 at 09:44
  • I don't know if it's possible to only match the part before the . with SSH. – Wieland Apr 06 '22 at 11:37