`stat /sbin/init` を試す

https://itsfoss.com/check-if-systemd/#method-1-check-if-systemd-is-in-use-with-the-stat-command

#Linux

SysVinit

```

$ stat /sbin/init

File: /sbin/init

Size: 52400 Blocks: 104 IO Block: 4096 通常ファイル

Device: 259,7 Inode: 2753640 Links: 1

Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)

Access: 2023-04-03 15:25:22.000000000 +0900

Modify: 2023-04-03 15:25:22.000000000 +0900

Change: 2024-07-19 20:09:23.976419714 +0900

Birth: 2024-07-19 20:09:23.976419714 +0900

```

#Linux