From a local terminal type:
nautilus
***If your Linux distro does not support nautilus you may be able to use the supported file browser and follow along.
Once open click 'File' > 'Connect to Server...'
Server: lonestar.tacc.utexas.edu
Type: SSH
Folder: /scratch/01749/geoffc (Use your $SCRATCH directory.)
User name: <user>
Password: <password>