Can you type the following commands into the terminal and give me the response? They won't change anything on your system, just list some settings.
$ postconf myhostname $ cat /etc/hosts $ cat /etc/hostname
Can you type the following commands into the terminal and give me the response? They won't change anything on your system, just list some settings.
$ postconf myhostname
$ cat /etc/hosts
$ cat /etc/hostname