Sambaが止まっているはずなのにプロセスが使用中の場合の解決法

エラー内容

$ sudo systemctl status samba-ad-dc.service
* samba-ad-dc.service - Samba AD Daemon
     Loaded: loaded (/lib/systemd/system/samba-ad-dc.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Sun 2021-07-25 00:09:33 JST; 1s ago
       Docs: man:samba(8)
             man:samba(7)
             man:smb.conf(5)
    Process: 3465 ExecStart=/usr/sbin/samba --foreground --no-process-group $SAMBAOPTIONS (code=exited, status=1/FAILURE)
   Main PID: 3465 (code=exited, status=1/FAILURE)
     Status: "Starting process..."

Jul 25 00:09:33 ik1-442-53089 smbd[3480]:   ERROR: smbd is already running. File /run/samba/smbd.pid exists and process id 2092 is running.
Jul 25 00:09:33 ik1-442-53089 samba[3475]: [2021/07/25 00:09:33.107690,  0] ../../file_server/file_server.c:45(file_server_smbd_done)
Jul 25 00:09:33 ik1-442-53089 samba[3475]:   file_server smbd daemon died with exit status 1
Jul 25 00:09:33 ik1-442-53089 samba[3475]: [2021/07/25 00:09:33.107815,  0] ../../source4/smbd/service_task.c:36(task_server_terminate)
Jul 25 00:09:33 ik1-442-53089 samba[3475]:   task_server_terminate: task_server_terminate: [smbd child process exited]
Jul 25 00:09:33 ik1-442-53089 samba[3465]: [2021/07/25 00:09:33.164919,  0] ../../source4/smbd/server.c:370(samba_terminate)
Jul 25 00:09:33 ik1-442-53089 samba[3465]:   samba_terminate: samba_terminate of samba 3465: smbd child process exited
Jul 25 00:09:33 ik1-442-53089 systemd[1]: samba-ad-dc.service: Main process exited, code=exited, status=1/FAILURE
Jul 25 00:09:33 ik1-442-53089 systemd[1]: samba-ad-dc.service: Failed with result 'exit-code'.
Jul 25 00:09:33 ik1-442-53089 systemd[1]: Failed to start Samba AD Daemon.

やり方

起動しているプロセスを終了させる

$ sudo killall smbd

もしくはプロセスIDが分かる場合はそれを使用する
※上記の場合はエラー内容にプロセスIDが書かれている。

$ sudo kill 2092