[OCLUG-Tech] passwordless ssh access to just one directory tree / auto close of app

[John C Nash <nashjc [ at ] uottawa [ dot ] ca>]

I'm working gradually toward a fairly nice setup to use a laptop to play 
music for dancing. The current setup is debian + kde. I make the machine 
come up without login to a konqueror screen listing the dance mp3s and 
instructions (plain txt), and have set the font quite large. No mouse or 
touchpad needed, just up and down arrows and enter.

Two questions:

1) For updating the collection, I'd like to rsync with a directory (and 
any subdirs) on a server, but want the "music machine" to only have 
access to the single directory, which I don't really want under a 
separate user on the server, since the files are part of a larger 
collection and files migrate in and out as we test them out for use. Is 
there a way to have an ssh key so only the one directory is accessible.

2) We've noted some folk don't close the player or text viewer and when 
memory gets low the sound stops! I'm thinking I should use a script to 
close any existing players or text windows when a new one starts, but am 
not sure how to do this cleanly.

Ideas welcome.  Note that this is an ongoing exercise and not a "right 
now" problem.

JN