Passwordless login

To synchronize data to a remote server using RsyncUI, passwordless login via SSH-key authentication is required. It is not possible to provide a user login and password during data synchronization via RsyncUI. SSH-key authentication is generally considered more secure than password-based authentication.

If default values for RSA-based SSH-key authentication are used, no additional information about the SSH-key is required in RsyncUI. However, it is necessary to provide information if custom SSH-keypath, identityfile, or port number is used.

The SSH-keypath and identityfile are specified as follows:

-e "ssh -i ~/.keypath/identityfile -p NN"

where:

• -i ~/.keypath/identityfile is the SSH-keypath and identityfile
• -p NN is the port number used for communication (default port 22)

To use my own SSH-key and SSH-keypath data, the following is added to RsyncUI in the settings:

To configure SSH-keypath and Identityfile, refer to the user configuration located in the SSH settings. When enabling user-selected SSH-keypath and Identityfile, please ensure they adhere to the following format:

~/.mynewsshdirectorylog/mynewkey

like

~/.ssh_rsyncosx/rsyncosx

The prefix must be ~ followed by a /. RsyncUI will verify that the SSH-keypath begins with ~ and contains at least two / characters before saving the new SSH-keypath.

The rsync command to synchronize my Documents directory is set by RsyncUI to my Raspberry Pi server:

/opt/homebrew/bin/rsync --archive --verbose --compress \
-e "ssh -i ~/.ssh_rsyncosx/rsyncosx -p 22" --stats \
/Users/thomas/Documents/ thomas@raspberrypi:/backups/Documents/

For more information on passwordless login, please refer to the Tools passwordless login section.