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copy from host1 to host2, through your host

Terminal - copy from host1 to host2, through your host
ssh root@host1 "cd /somedir/tocopy/ && tar -cf - ." | ssh root@host2 "cd /samedir/tocopyto/ && tar -xf -"
2010-04-16 06:48:47
User: peshay
Functions: ssh
15
copy from host1 to host2, through your host

Good if only you have access to host1 and host2, but they have no access to your host (so ncat won't work) and they have no direct access to each other.

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives
ssh user@<source_host> -- tar cz <path> | ssh user@<destination_host> -- tar vxzC <path>
2010-04-20 12:30:49
User: dranan
Functions: ssh tar
2

This is a 'nocd' alternative :)

Know a better way?

If you can do better, submit your command here.

What others think

i like this, but it takes the content of the directory you copy from and puts it where you specify, i'm not quite sure how you would do a certain file without takign the whole directory.

Comment by alf 209 weeks and 5 days ago

for a certain file you could do

ssh root@host1 "tar -cf - certainfile" | ssh root@host2 "tar -xf -"

for text file you also may use something like

ssh root@host1 "cat certainfile.txt" | ssh root@host2 "cat >> certainfile.txt"

but I didn't tried it yet

Comment by peshay 209 weeks and 5 days ago

There's no reason to use tar at all if it's just a single file -- you could do

ssh root@host1 cat filename | ssh root@host2 cat >filename

This method means typing the filename twice, though.

But it's worth noting that if host1 can log in to host2 directly (and it seems you need to have SSH keys set up so host2 won't ask for a password from host1) you can do

scp root@host1:filename root@host2:
Comment by tremby 209 weeks and 5 days ago

That first example should have had host2's commands in quotes otherwise it'll redirect to a file on your local machine. So

ssh root@host1 cat filename | ssh root@host2 "cat >filename"

No quotes are needed for command for host1 in this case.

Comment by tremby 209 weeks and 5 days ago

Your point of view

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