kazulog@sv1:~$ echo 'brokendirective;' | sudo tee /etc/nginx/conf.d/broken.conf
brokendirective;
kazulog@sv1:~$ sudo systemctl restart nginx
Job for nginx.service failed because the control process exited with error code.
See "systemctl status nginx.service" and "journalctl -xeu nginx.service" for details.
kazulog@sv1:~$ systemctl is-active nginx
failed
kazulog@sv1:~$ systemctl --failed --no-pager
  UNIT          LOAD   ACTIVE SUB    DESCRIPTION
● nginx.service loaded failed failed A high performance web server and a reverse proxy server

Legend: LOAD   → Reflects whether the unit definition was properly loaded.
        ACTIVE → The high-level unit activation state, i.e. generalization of SUB.
        SUB    → The low-level unit activation state, values depend on unit type.

1 loaded units listed.
kazulog@sv1:~$ systemctl status nginx --no-pager -l | head -14 | cat
× nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Thu 2026-09-10 15:49:41 JST; 151ms ago
   Duration: 11.927s
 Invocation: 87d8bbb0ef24470d85db158ae79b23bd
       Docs: man:nginx(8)
    Process: 1911 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=1/FAILURE)
   Mem peak: 1.7M
        CPU: 16ms

Sep 10 15:49:41 sv1 systemd[1]: Starting nginx.service - A high performance web server and a reverse proxy server...
Sep 10 15:49:41 sv1 nginx[1911]: 2026/09/10 15:49:41 [emerg] 1911#1911: unknown directive "brokendirective" in /etc/nginx/conf.d/broken.conf:1
Sep 10 15:49:41 sv1 nginx[1911]: nginx: configuration file /etc/nginx/nginx.conf test failed
Sep 10 15:49:41 sv1 systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
kazulog@sv1:~$ sudo journalctl -u nginx -p err --since '2 min ago' --no-pager | cat
Sep 10 15:49:41 sv1 systemd[1]: Failed to start nginx.service - A high performance web server and a reverse proxy server.
kazulog@sv1:~$ sudo rm /etc/nginx/conf.d/broken.conf
kazulog@sv1:~$ sudo systemctl restart nginx
kazulog@sv1:~$ systemctl is-active nginx
active