The best way to submit files electronically is to submit a directory containing all your project files. You must do this from a linux instructional machine.
If your current directory contains the directory "myprojectdir" with the files you want to submit, then you would type:
turnin -c cse326 -p projectname myprojectdir
Obviously, you must modify the above command to reflect the current project name and your directory name. The argument following the -c flag indicates the course and section. The argument following the -p flag indicates the project number or code. The last argument is the directory name. There is a man page for turnin on the instructional machines if you would like to learn about all the options, but it shouldn't be necessary.
You should receive a message like "Your files have been submitted to cse326, projectname for grading". That's it. If you submit more than once, your latest submission will overwrite the prior submission.