HOSTNAME(5) hostname HOSTNAME(5) hostname - /etc/hostname /etc/hostname . systemd(1) sethostname(2). . ( "#"). 64 ASCII 7- DNS . DNS . 64 ( DNS 63) 255 ( DNS). . "?" machine-id(5) . : "foobar-????-????" "foobar-92a9-061c" . hostnamectl(1) . systemd-firstboot(1) ( ). systemd(1) : o systemd.hostname= systemd(1) kernel-command-line(7) o "" /etc/hostname . o DHCP systemd-hostnamed.service(8). NetworkManager[1] systemd-networkd.service(8) . systemd-hostnamed.service(8) . o ("archlinux"). . . . systemd . /etc/hostname Debian GNU/Linux. systemd(1), sethostname(2), hostname(1), hostname(7), machine-id(5), machine-info(5), hostnamectl(1), systemd-hostnamed.service(8), systemd-firstboot(1) 1. NetworkManager https://developer.gnome.org/NetworkManager/stable/ 3 . . : . systemd 260.2 HOSTNAME(5)