You need to generate a key file to authenticate yourself to the server. To do this simply click on this link:
You will need to login with your SLAC username/password if you have not already done so. Save the downloaded key file as ~/.downloadManager/glastKeyFile. Remember to set the permissions on the file/directory so it can only be read by the user who will run the command line download manager.
Store it anywhere you like.
java -version
You need version 1.5 or greater.
From the directory where you save netx-0.5.jar issue the following command.
java -jar netx-0.5.jar -headless -basedir ~/.downloadManager -jnlp http://glast-ground.slac.stanford.edu/DownloadManager/LineMode.jnlp -arg --folder=/Data/Flight/Level1/LPA -arg --group=FT1
Notes: