I just transfered all of my files and settings over to a new laptop using Migration Assistant (on a mac). The name of my computer in terminal is wrong for some reason. It's unknown20c9d042dc93
The prompt looks like this
Last login: Thu Jul 19 19:46:15 on ttys001 unknown20c9d042dc93:~ Ryan$
How do I change the name to what it usually is, Ryan's Macbook?