In order to prevent having other students use your work, please make sure that you protect your directories and files. You can use the UNIX "umask" command to set the default permissions of all of the files you create. You can also use the "chmod" command to change the permissions on files to make them readable by only yourself; e.g.,
Please as a favor to all of us, make sure your files are protected. Don't let other people steal your work.