# Mintafájl a Z6.2 feladathoz (VPS és Linux-szerverüzemeltetés tanfolyam)
# "web1" szerver (Debian 13). Egy saját szolgáltatás, amely egy kis webalkalmazást futtat.

anna@web1:~$ systemctl status factuurapp
× factuurapp.service - Factuurapp (Node.js)
     Loaded: loaded (/etc/systemd/system/factuurapp.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Mon 2026-11-09 10:15:07 CET; 12min ago
   Duration: 412ms
    Process: 2291 ExecStart=/usr/bin/node /opt/factuurapp/server.js (code=exited, status=1/FAILURE)
   Main PID: 2291 (code=exited, status=1/FAILURE)
        CPU: 389ms

anna@web1:~$ sudo journalctl -u factuurapp --since "2026-11-09 10:14" --no-pager
nov 09 10:15:01 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:01 web1 node[2240]: Factuurapp 3.2.0 start op 127.0.0.1:3000
nov 09 10:15:01 web1 node[2240]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:01 web1 node[2240]:     at Server.setupListenHandle [as _listen2] (node:net:1908:16)
nov 09 10:15:02 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:02 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:03 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 1.
nov 09 10:15:03 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:03 web1 node[2252]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:03 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:03 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:04 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 2.
nov 09 10:15:04 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:05 web1 node[2266]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:05 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:05 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:06 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 3.
nov 09 10:15:06 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:06 web1 node[2279]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:06 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:06 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 4.
nov 09 10:15:07 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:07 web1 node[2291]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Start request repeated too quickly.
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:07 web1 systemd[1]: Failed to start factuurapp.service - Factuurapp (Node.js).

anna@web1:~$ sudo ss -tlnp | grep 3000
LISTEN 0 511 127.0.0.1:3000 0.0.0.0:* users:(("node",pid=1187,fd=21))

Kérdések:
1. Mi a szolgáltatás (a unit) neve?
2. Összesen hányszor indult el a szolgáltatás (Started sorok)?
3. Milyen kilépési kóddal (status) állt le a program?
4. Az első hibaüzenet szerint mi az ok?
   a. Hiányzik a server.js fájl
   b. A 3000-es portot a 127.0.0.1 címen már egy másik folyamat használja
   c. A szervernek túl kevés a memóriája
   d. A szolgáltatás rossz felhasználóként fut
5. Hány órakor (óó:pp:mm) adta fel a systemd az újraindítást?
6. Melyik folyamat foglalja a portot (pid)?