16 ms·

"They could have used rsync without installing rsync on the device. The target device doesn't need to have rsync for rsync to be used." This is not true.

kayodelycaon 5y ago
It very much is true. I do it all the time. If the target device is running ssh, you can use rsync on the source. https://www.digitalocean.com/community/tutorials/how-to-copy-files-with-rsync-over-ssh https://www.digitalocean.com/community/tutorials/how-to-copy... Edit: Looks like I was wrong.
- xdfgh1112 5y ago
  Doesn't that run rsync --server on the server via ssh?
  - throwaway09223 5y ago
    yup.
- throwaway09223 5y ago
  No, it is not true. You're misunderstanding how this works. The document you link is using ssh as a transport protocol as opposed to the rsync protocol. The rsync binary must be installed on both systems for this to work. When you run something like: rsync file user@rhost:/dest/path The local rsync binary invokes ssh, and then executes the rsync binary on the remote system and from there the two instances of rsync effectuate the transfer. If you do not have rsync available in your path on the remote system you will not be able to copy files over ssh. This is documented in the manpage. Try it.
  - _hyn3 5y ago
    Exactly. You absolutely must have the rsync binary installed locally. The rsync "server" should only actually be run if you know you need it (that is, only if you are providing rsync services to other people).
- tnhh 5y ago
  As others have pointed out, that doesn't quite work. But the way that I use rsync with my remarkable is to use sshfs to mount the remarkable's filesystem, and then run rsync between the local and mounted filesystems. Works for me without having to install rsync on the remarkable.
  - danachow 5y ago
    Unfortunately you will not get any speed boost in that case, in fact it will be slower having to fetch all the remote side data for small file changes.
    - tnhh 5y ago
      Fair enough. It does work for my simple use case: rsync student coursework to the remarkable, mark coursework on the remarkable, rsync back. There aren't many small file changes and USB is fast enough. The real bottleneck is the marking but I'm not sure if I want a package manager to help me with that!

kayodelycaon 5y ago

It very much is true. I do it all the time. If the target device is running ssh, you can use rsync on the source. https://www.digitalocean.com/community/tutorials/how-to-copy-files-with-rsync-over-ssh https://www.digitalocean.com/community/tutorials/how-to-copy... Edit: Looks like I was wrong.

xdfgh1112 5y ago
Doesn't that run rsync --server on the server via ssh?
- throwaway09223 5y ago
  yup.
throwaway09223 5y ago
No, it is not true. You're misunderstanding how this works. The document you link is using ssh as a transport protocol as opposed to the rsync protocol. The rsync binary must be installed on both systems for this to work. When you run something like: rsync file user@rhost:/dest/path The local rsync binary invokes ssh, and then executes the rsync binary on the remote system and from there the two instances of rsync effectuate the transfer. If you do not have rsync available in your path on the remote system you will not be able to copy files over ssh. This is documented in the manpage. Try it.
- _hyn3 5y ago
  Exactly. You absolutely must have the rsync binary installed locally. The rsync "server" should only actually be run if you know you need it (that is, only if you are providing rsync services to other people).
tnhh 5y ago
As others have pointed out, that doesn't quite work. But the way that I use rsync with my remarkable is to use sshfs to mount the remarkable's filesystem, and then run rsync between the local and mounted filesystems. Works for me without having to install rsync on the remarkable.
- danachow 5y ago
  Unfortunately you will not get any speed boost in that case, in fact it will be slower having to fetch all the remote side data for small file changes.
  - tnhh 5y ago
    Fair enough. It does work for my simple use case: rsync student coursework to the remarkable, mark coursework on the remarkable, rsync back. There aren't many small file changes and USB is fast enough. The real bottleneck is the marking but I'm not sure if I want a package manager to help me with that!