The instruction will be separate for students working on-campus and for CVS students. Please read and follow the section that applies to you.
cd ~/cs3101-01/hw1
Obviously, this will be different if you were working in a different directory.
Once you are in the desired directory, type "ls" to make sure all the files you want submitted are there, then type
/opt/ACISsubmit/bin/submit ib42
This will ask you for confirmation, and then submit the contents of that directory. You should get an email with the results of the submission within a few minutes.
Otherwise, please send all the java files you created for this homework to ib42@columbia.edu (via email, of course). Please use some meaningful subject line for your message, such as "Submission for CS3101-01", and also make sure your full name appears in the body of the message. In fact, the best way to do it is to have a brief comment at the beginning of your java files containing your name and email address.
Thanks for your patience and good luck!