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.,

1. Change the default permissions of all files you create by placing the following in your shell's startup file (.bashrc, .zshrc)
   # add to startup file
   umask 077
   
2. Protect your source code
   # recursively remove group and other read/write/execute permissions
   % chmod -R go-rwX .
   # check it
   % ls -alR .
   

Please as a favor to all of us, make sure your files are protected. Don't let other people steal your work.