システムのホスト名や関連する設定を照会・変更できるhostnamectlというコマンドがある。(Ubuntu 22.04.1 LTSで確認)
$ hostnamectl Static hostname: sstx Icon name: computer-laptop Chassis: laptop Machine ID: 0435c0d2684641d491ef7a8c69295556 Boot ID: f964fbe42b7a4e429f37c304c53674a7 Operating System: Ubuntu 22.04.1 LTS Kernel: Linux 5.15.0-46-generic Architecture: x86-64 Hardware Vendor: Micro-Star International Co., Ltd. Hardware Model: GF63 Thin 10SCXR $
ホスト名を変更するには、
$ hostnamectl hostname ssty $ hostnamectl Static hostname: ssty Icon name: computer-laptop Chassis: laptop Machine ID: 0435c0d2684641d491ef7a8c69295556 Boot ID: f964fbe42b7a4e429f37c304c53674a7 Operating System: Ubuntu 22.04.1 LTS Kernel: Linux 5.15.0-46-generic Architecture: x86-64 Hardware Vendor: Micro-Star International Co., Ltd. Hardware Model: GF63 Thin 10SCXR $
kimi@sstx:~$ timedatectl Local time: Wed 2022-08-24 07:12:56 UTC Universal time: Wed 2022-08-24 07:12:56 UTC RTC time: Wed 2022-08-24 07:12:56 Time zone: Etc/UTC (UTC, +0000) System clock synchronized: yes NTP service: active RTC in local TZ: no kimi@sstx:~$ sudo timedatectl set-timezone Asia/Tokyo kimi@sstx:~$ timedatectl Local time: Wed 2022-08-24 16:13:26 JST Universal time: Wed 2022-08-24 07:13:26 UTC RTC time: Wed 2022-08-24 07:13:26 Time zone: Asia/Tokyo (JST, +0900) System clock synchronized: yes NTP service: active
kimi@sstx:~$ localectl System Locale: LANG=en_US.UTF-8 VC Keymap: n/a X11 Layout: jp X11 Model: pc105 kimi@sstx:~$ localectl list-locales C.UTF-8 en_US.UTF-8 ja_JP.UTF-8 kimi@sstx:~$ sudo apt -y install language-pack-ja-base language-pack-ja^C kimi@sstx:~$ sudo localectl set-locale ja_JP.UTF-8 kimi@sstx:~$ localectl System Locale: LANG=ja_JP.UTF-8 VC Keymap: n/a X11 Layout: jp X11 Model: pc105