To update the submitty code, get the specific branch/release to which you want to upgrade. For example:
cd /usr/local/submitty/GIT_CHECKOUT_Submitty git checkout master git pull origin master
Then re-install the system. This should take less than a minute. It will pause and restart from scratch any autograding that is currently happening.
Depending on what has updated in the system, you may need to also rebuild the autograding scripts for your existing courses & gradeables. And regrade the previously submitted assignments (especially if you’re installing the update to fix a problem).
See more information in: Development Instructions