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scp a good script from host A which has no public access to host C, but with a hop by host B

Terminal - scp a good script from host A which has no public access to host C, but with a hop by host B
ssh middlehost "ssh -a root@securehost '> nicescript'" < nicescript
2009-08-26 20:25:12
User: 0x89
Functions: ssh
0
scp a good script from host A which has no public access to host C, but with a hop by host B

Stop tormenting the poor animal cat!

Also you should not that you need a private key not protected by a passphrase on middlehost that grants you access to securehost..

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives
cat nicescript |ssh middlehost "cat | ssh -a root@securehost 'cat > nicescript'"
2009-08-25 08:11:12
User: syladmin
Functions: cat ssh
Tags: ssh scp
4

middlehost allows ssh access from where you are but not securehost.

Use nice ssh piping to simulate scp through A => B => C

setting up the shell function if left as an exercise for the reader. ;-)

Agent forwarding should avoid password typing.

Know a better way?

If you can do better, submit your command here.

What others think

I vote for eichin's way:

tar -cf - foo.sh | ssh middlehost ssh -a securehost tar -x -C ~/ -f -

This has the advantage that timestamps and permissions (important, especially for scripts) are preserved.

Comment by unixmonkey3280 261 weeks and 1 day ago

About ssh-agent is working for me. running on my workstation with some hop before :

WS > hostX > hostA

running the command on hostA simulating :

scp through A => B => C

in my test, hostX and B is the same server!

tar of course, is "better", you can even copy more than one script/file. keeping permission and owner wasn't a requirement, can do some prob, if the original owner on hostA doesn't exist on hostC, or you simply want to give the file to root.

Comment by syladmin 259 weeks and 6 days ago

Your point of view

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