kazulog@sv2:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv2:~$ hostname
sv2
kazulog@sv2:~$ hostname -f
ubuntu
kazulog@sv2:~$ hostname -s
sv2
kazulog@sv2:~$ hostnamectl | cat
 Static hostname: sv2
       Icon name: computer-vm
         Chassis: vm 🖴
      Machine ID: 93e17e35d31f4593a7bbe846e580a46c
         Boot ID: cab4fd6835544463b27189b47acb1fad
  Virtualization: kvm
Operating System: Ubuntu 26.04 LTS
          Kernel: Linux 7.0.0-30-generic
    Architecture: x86-64
 Hardware Vendor: QEMU
  Hardware Model: Standard PC _i440FX + PIIX, 1996_
Hardware Version: pc-i440fx-8.0
Firmware Version: 1.16.3-debian-1.16.3-2
   Firmware Date: Tue 2014-04-01
    Firmware Age: 12y 5month 1w 5d
kazulog@sv2:~$ cat /etc/hostname
sv2
kazulog@sv2:~$ cat /etc/hosts
# Your system has configured 'manage_etc_hosts' as True.
# As a result, if you wish for changes to this file to persist
# then you will need to either
# a.) make changes to the master file in /etc/cloud/templates/hosts.debian.tmpl
# b.) change or remove the value of 'manage_etc_hosts' in
#     /etc/cloud/cloud.cfg or cloud-config from user-data
#
127.0.1.1 ubuntu sv2
127.0.0.1 localhost

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

kazulog@sv2:~$ getent hosts $(hostname)
127.0.1.1       ubuntu sv2
kazulog@sv2:~$ grep -rn 'PreserveFQDN\|LocalHostName' /etc/rsyslog.conf /etc/rsyslog.d/ 2>&1; echo "grep rc=$?"
grep rc=1
kazulog@sv2:~$ systemctl show rsyslog -p ExecMainStartTimestamp -p ActiveEnterTimestamp | cat
ActiveEnterTimestamp=Sat 2026-09-12 16:32:56 JST
ExecMainStartTimestamp=Sat 2026-09-12 16:32:55 JST
kazulog@sv2:~$ sudo journalctl -b -o short-precise | grep -iE 'hostname|cloud-init.*(running|finished)' | head -25
Sep 12 16:32:31.409724 localhost systemd[1]: No hostname configured, using default hostname.
Sep 12 16:32:31.409742 localhost systemd[1]: Hostname set to <localhost>.
Sep 12 16:32:38.548926 ubuntu systemd[1]: Hostname set to <ubuntu>.
Sep 12 16:32:39.742153 ubuntu systemd-resolved[640]: Using system hostname 'ubuntu'.
Sep 12 16:32:48.918159 ubuntu cloud-init[934]: Cloud-init v. 26.1-0ubuntu3~26.04.1 running 'init-local' at Sat, 12 Sep 2026 07:32:48 +0000. Up 22.73 seconds.
Sep 12 16:32:50.384247 ubuntu cloud-init[934]: Cloud-init v. 26.1-0ubuntu3~26.04.1 running 'init' at Sat, 12 Sep 2026 07:32:50 +0000. Up 24.19 seconds.
Sep 12 16:32:52.348090 sv2 systemd-resolved[640]: System hostname changed to 'sv2'.
Sep 12 16:32:53.519097 sv2 systemd[1]: Listening on systemd-hostnamed.socket - Hostname Service Socket.
Sep 12 16:32:54.848238 sv2 cloud-init[934]: Cloud-init v. 26.1-0ubuntu3~26.04.1 running 'modules:config' at Sat, 12 Sep 2026 07:32:54 +0000. Up 27.92 seconds.
Sep 12 16:32:59.773455 sv2 cloud-init[934]: Cloud-init v. 26.1-0ubuntu3~26.04.1 running 'modules:final' at Sat, 12 Sep 2026 07:32:59 +0000. Up 33.56 seconds.
Sep 12 16:33:37.752636 sv2 cloud-init[934]: Running kernel seems to be up-to-date.
Sep 12 16:33:37.766806 sv2 cloud-init[934]: No user sessions are running outdated binaries.
Sep 12 16:33:37.766806 sv2 cloud-init[934]: No VM guests are running outdated hypervisor (qemu) binaries on this host.
Sep 12 16:33:40.133352 sv2 cloud-init[934]: Cloud-init v. 26.1-0ubuntu3~26.04.1 finished at Sat, 12 Sep 2026 07:33:40 +0000. Datasource DataSourceNoCloud [seed=/dev/sr0].  Up 72.95 seconds
Sep 12 16:33:40.404877 sv2 systemd[1]: cloud-init-main.service: Unit process 933 (sh) remains running after unit stopped.
Sep 12 16:34:53.036411 sv2 dbus-daemon[1108]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.27' (uid=1000 pid=2188 comm="hostnamectl" label="unconfined")
Sep 12 16:34:53.044263 sv2 systemd[1]: Starting systemd-hostnamed.service - Hostname Service...
Sep 12 16:34:53.138615 sv2 systemd[1]: Started systemd-hostnamed.service - Hostname Service.
Sep 12 16:34:53.141363 sv2 dbus-daemon[1108]: [system] Successfully activated service 'org.freedesktop.hostname1'
kazulog@sv2:~$ sudo cloud-init status --long | cat
status: done
extended_status: degraded done
boot_status_code: enabled-by-generator
last_update: Thu, 01 Jan 1970 00:01:12 +0000
detail: DataSourceNoCloud [seed=/dev/sr0]
errors: []
recoverable_errors:
WARNING:
	- Not unlocking password for user kazulog. 'lock_passwd: false' present in user-data but no 'passwd'/'plain_text_passwd'/'hashed_passwd' provided in user-data
	- Not unlocking password for user kazulog. 'lock_passwd: false' present in user-data but no 'passwd'/'plain_text_passwd'/'hashed_passwd' provided in user-data