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82 lines
3.6 KiB
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[#]: subject: "How to Find Systemd or Any Other init System in Linux"
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[#]: via: "https://www.debugpoint.com/systemd-or-init/"
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[#]: author: "Arindam https://www.debugpoint.com/author/admin1/"
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[#]: collector: "lkxed"
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[#]: translator: " "
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[#]: reviewer: " "
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[#]: publisher: " "
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[#]: url: " "
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How to Find Systemd or Any Other init System in Linux
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======
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**Here’s how you can determine if you are running systems or any other init system in your Linux distribution.**
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The first process, which starts when you boot up your Linux distribution, is called init (short for initialization). It has the process identifier 1 (i.e. pid=1). All the processes and applications in your Unix-based system are direct descendants of this init process.
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Based on functionality and features, different types of init processes are present. For example, [systemd][1], Runit, OpenRC, sysVinit, etc. Among those, the systemd is the most popular and modern one, which is used and adopted by all the modern Linux distributions, including Ubuntu and Fedora.
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There are ongoing debates about Systemd and its performance compared to the traditional Unix-based init systems. But that’s a topic for another article.
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let’s find out how you can determine whether you are running a systemd or any other init system in your Linux distribution.
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### Systemd or what init system?
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Unfortunately, there’s no direct command to find it out. You can trace it back from the init process id=1, which is basically a symbolic link to `/sbin/init` i.e. pid=1.
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Use `[strings][2]` command to print the text embedded in the binary file `/sbin/init` & search for init with the following command.
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```
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strings /sbin/init | grep init
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```
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**Example 1**: In this below output where it’s a sysVinit system running Debian (via Peppermint OS). As you can see, it clearly shows the init process name.
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```
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strings /sbin/init | grep init
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```
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![example showing the init is used and not systemd][3]
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If you find systemd in the same above system, there won’t be any entries. Hence you can conclude that you are running sysvinit and not systemd.
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**Example 2**: If you run the above command in a systemd system, you can easily see the systemd and its version at the first line of the output.
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```
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strings /sbin/init | grep systemd
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```
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![example showing it uses systemd][4]
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**Example 3**: You can also try to print the process tree using `pstree` command, which should show you the first process name. It should be either systemd or init, as shown in the below example.
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```
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pstree
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```
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![pstree is showing systemd is used][5]
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![pstree is showing init is used][6]
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That’s it. This is how you can easily find out whether your distro uses systemd or something else.
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--------------------------------------------------------------------------------
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via: https://www.debugpoint.com/systemd-or-init/
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作者：[Arindam][a]
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选题：[lkxed][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.debugpoint.com/author/admin1/
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[b]: https://github.com/lkxed
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[1]: https://www.debugpoint.com/tag/systemd
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[2]: https://linux.die.net/man/1/strings
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[3]: https://www.debugpoint.com/wp-content/uploads/2022/11/example-showing-the-init-is-used-and-not-systemd.jpg
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[4]: https://www.debugpoint.com/wp-content/uploads/2022/11/example-showing-it-uses-systemd.jpg
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[5]: https://www.debugpoint.com/wp-content/uploads/2022/11/pstree-is-showing-systemd-is-used.jpg
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[6]: https://www.debugpoint.com/wp-content/uploads/2022/11/pstree-is-showing-init-is-used.jpg
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