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I want to write a script to enable my program on boot automatically. This can be done using SysV Init, Upstart or systemd. However, I am not able to figure out which init system my Raspbian uses.

Another doubt I have is that, suppose the default init system is upstart, then will a script written and enabled with systemd work? To rephrase, do we need to write init script in the default init system to make it work?

Will
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Adi
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1 Answers1

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Raspian is basically Debian.

Debian until and including Wheezy/7 used SysV, since Jessie/8 systemd.

Upstart is not relevant anymore, since even RHEL and Ubuntu (the Upstart developers) have moved to systemd.

systemd is very different from sysv. However, there is a compatibility layer in systemd that will transparently create units for properly annotated sysv init scripts on the fly. If you plan to distribute your init script to other raspian users, a well-tested sysv init script will also work in systemd. While systemd is pretty complex, creating services is actually surprisingly simple.

As for the init system on your machine, stat /sbin/init should give you a good indication on Debian. For general initsystem detection, this Unix&Linux question has excellent answers. u

kba
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  • The question link to on U&LSE is marked as a duplicate of this one! Also - Debian (and thus Raspbian) do provide a working choice for init systems on both Wheezy and Jessie versions - those indications are the defaults but the opposite (SysV init vs. systemd) can be selected - all my machines (PCs & RPis) use SysV init even though some are using Jessie...! 8-) {For the record do not try to install upstart into an init using Jessie system directly - that breaks very badly... 8-( } – SlySven Feb 22 '16 at 19:07
  • sudo stat /sbin/init File: ‘/sbin/init’ Size: 284844 Blocks: 560 IO Block: 4096 regular file Device: b307h/45831d Inode: 669590 Links: 1 Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2016-02-17 22:15:59.000000000 +0300 Modify: 2014-12-09 15:36:55.000000000 +0300 Change: 2016-02-17 22:16:07.991854912 +0300 Birth: -

    This is the output. I cannot figure out the init system from this.

     – Adi Feb 27 '16 at 12:15
  • I was able to find out using answers here.http://unix.stackexchange.com/questions/18209/detect-init-system-using-the-shell – Adi Feb 27 '16 at 15:45