kazulog@sv2:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv2:~$ sudo journalctl --list-boots | cat
IDX BOOT ID                          FIRST ENTRY                 LAST ENTRY
  0 4f9f7c1daaf243d4960ea2db7ed0f299 Sat 2026-09-12 08:22:47 JST Sat 2026-09-12 08:28:51 JST
kazulog@sv2:~$ which logger
/usr/bin/logger