useradd bobYou probably won't see any fireworks go off. You might not see anything. That doesn't matter. Linux has been told that there's a new user and his name's 'bob'.
pwdYou'll see this: /home.
ls -ato see what's in the directory. We'll go into more detail with the ls command later. With the -a option, you'll see some files that begin with a '.' (period/dot). Those would normally be hidden from you if you didn't use the -a.