kazulog@webserver:~$ sudo hostnamectl set-hostname --transient dbserver
Hint: static hostname is already set, so the specified transient hostname will not be used.
kazulog@webserver:~$ hostnamectl | head -2
 Static hostname: webserver
       Icon name: computer-vm
kazulog@webserver:~$ hostname
webserver
kazulog@webserver:~$ cat /etc/hostname
webserver
kazulog@webserver:~$ sudo hostnamectl set-hostname --pretty 'Kazulog Web Server'
kazulog@webserver:~$ hostnamectl | head -3
 Static hostname: webserver
 Pretty hostname: Kazulog Web Server
       Icon name: computer-vm
kazulog@webserver:~$ cat /etc/machine-info
PRETTY_HOSTNAME="Kazulog Web Server"