alice@darkstar:~$ id
uid=1016(alice) gid=100(users) groups=100(users)
root@darkstar:~# id
uid=0(root) gid=0(root) groups=0(root)
alice@darkstar:~$ whoami
alice
alice@darkstar:~$ id -un # Where `-u` refers to `--user` and `-n` refers to `--name`
alice