Is it possible to make scp Continue/Resume after an interruption?

lothario · 06-03-2006, 10:22 PM

Is it possible to make scp Continue/Resume copying a file after an interruption?
I have only scp/ssh access to a host and I would like to have scp recover and continue, when necessary.

But how?

macemoneta · 06-03-2006, 10:52 PM

No, but you can use rsync which can continue an interrupted transmission if you have ssh access:

rsync --rsh='ssh' -av --progress --partial source user@host:destination

lothario · 06-03-2006, 11:13 PM

Ok, I am trying to do this - but where do I enter the password for the remote system?

Also, is it possible to have it recursively go down a source directory structure
and scp each file and directory over to the destination?

Tinkster · 06-03-2006, 11:21 PM

Ad 1)
It should prompt you for a password... (I think)

Ad 2)
Yes, man rsync for details ;}

Cheers,
Tink

macemoneta · 06-03-2006, 11:28 PM

You can use the same authentication you use for ssh. That is, if you have exchanged keys with no passphrase, rsync can connect without prompting. If you normally are prompted for a password/passphrase, you will be prompted by rsync.

The '-a' option in the example will perform the recursive processing of subdirectories (as well as other common processing). As Tinkster indicated, man is your friend:

man rsync

lothario · 06-03-2006, 11:40 PM

Got it, thanks.

The reason the password was not being asked was because
on the remote system the sshd does not run on port 22.

So I changed
--rsh='ssh'
to
--rsh='ssh -p nnnn'
and it worked.