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Is it possible to use RSYNC with PLINK.EXE(PUTTY) as Remote shell?

I would like to automate backups from win32 cygwin environment to a linux backup server with rsync.
I can use rsync -e ssh but always get asked for a password (needs to be automated).
plink.exe has the option -pw to pass the password but I cannot get this to work in conjunction with the RSYNC -e remote shell option.

I have tried the following,

>rsync -e plink username@\
Access denied
Access denied
FATAL ERROR: Server sent disconnect message
"Too many authentication failures for username"
rsync:read error:Connection reset by peer
rsync error: error in resync protocol data stream (code 12) at io.c(354)

>rsync -e "plink -l username -pw password" username@\
bash: line 1: command not found
rsync: read error: Connection reset by peer
rsync error: error in resync protocol data stream (code 12) at io.c(354)

BUT the following works fine using ssh as the transport
>rsync -e ssh username@\

1 Solution
enable id-based authentification.

carillianAuthor Commented:
I want to pipe a password into rsync using a VB app - do not want to really leave private keys lying around for people to wander off with.

Anyone tried PLINK ? I need RSYNC functionality.
i use plink and pageant for cvs access to a linux machine, and i image the setup is similar.

1) create a public/private keyset using puttygen.exe.  you're right, you don't want to leave the keys lying around - so put them into a folder where only the user running the program has read access

2) setup a profile using putty.exe so that you can login using the keys created above (you'll probably have to copy/paste the public key to your server, too)

3) start pageant with the file path to your private key as an argument (e.g pageant.exe "c:\documents and settings\operator\my documents\etc")

4) now whenever plink.exe is invoked pageant will pass on the appropriate key

keysets with the appropriate permissions are the foundation of public key cryptography.  i'm guessing the vb app would just be a wrapper that writes the password to standard out - which is not very secure at all.
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