Date: Sat, 27 Dec 2008 16:47:12 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: User Questions <freebsd-questions@freebsd.org> Cc: Noah <admin2@enabled.com> Subject: Re: running shell command through ssh tunnel Message-ID: <49565C10.1010505@infracaninophile.co.uk> In-Reply-To: <44bpux7hjx.fsf@lowell-desk.lan> References: <4955887F.1090704@enabled.com> <44bpux7hjx.fsf@lowell-desk.lan>
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Lowell Gilbert wrote:
> Noah <admin2@enabled.com> writes:
>
>> I am trying to run a shell command to the host at the far end of an ssh
>> tunnel. Here is how I structured access. Is there any way to do this
>> more compactly on one line?
>>
>>
>> ssh -L 12345:192.168.1.20:22 noah@domain.com
>> ssh -p 12345 localhost 'chown -R noah:noah /shares/internal/Music/'
>
> Maybe I haven't had enough coffee yet, but wouldn't that just be
> ssh noah@192.168.1.20 'chown -R noah:noah /shares/internal/Music/'
> ? You might even want to use '-n' as an option to the ssh command.
ENOCOFFEE. Your equivalence is only the case if you're already logged
into 'domain.com' This is a fairly standard idiom for tunnelling a network
connection in through a NAT gateway or a firewall from an external Internet
site to a protected RFC 1918 internal back-end, although the forwarded protocol
is usually other than SSH.
Given that the OP is wanting to tunnel SSH through SSH, a one-liner to
achieve his desired effect might be something like:
ssh noah@domain.com ssh noah@192.168.1.20 chown -R noah:noah /shares/internal/Music/
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW
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