kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ sudo journalctl --list-boots | cat
IDX BOOT ID                          FIRST ENTRY                 LAST ENTRY
  0 8acaa563234f4775ba15e746e1c8b106 Sat 2026-09-12 10:14:30 JST Sat 2026-09-12 10:15:55 JST
kazulog@sv1:~$ sudo apt update 2>&1 | tail -1
96 packages can be upgraded. Run 'apt list --upgradable' to see them.
kazulog@sv1:~$ apt-cache policy vsftpd | head -3
vsftpd:
  Installed: (none)
  Candidate: 3.0.5-0.4
kazulog@sv1:~$ ls -l /etc/vsftpd.conf /srv/ftp 2>&1
ls: cannot access '/etc/vsftpd.conf': No such file or directory
ls: cannot access '/srv/ftp': No such file or directory
kazulog@sv1:~$ sudo ss -tlnp 'sport = :21'; echo "ss rc=$?"
State                  Recv-Q                  Send-Q                                   Local Address:Port                                   Peer Address:Port                 Process
ss rc=0