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Ducas

Member

From: Netherlands

Registered: 2018-04-04

Posts: 4  

/lib/systemd/ folder? and /etc/systemd/ folder?

Hello,

I just installed Devuan Jessie.

I found a systemd-folder in /lib/ and also in /etc/
What is the purpose of these folders in a non-systemd distro?

In Grub I found two 3.16 kernels. One has a (SysV) behind the kernel name. What is the difference?
Does the other use systemd?

Thanks in advance.

Geoff 42

Member

Registered: 2016-12-15

Posts: 462  

Re: /lib/systemd/ folder? and /etc/systemd/ folder?

Many packages ship with start-up files for systemd, but work without systemd. For a longer answer see :-

https://dev1galaxy.org/viewtopic.php?id=1925

Geoff

Ducas

Member

From: Netherlands

Registered: 2018-04-04

Posts: 4  

Re: /lib/systemd/ folder? and /etc/systemd/ folder?

Thank you for your quick reply! That answers my first question about the systemd files and folders.

What about the two different kernels?
In Grub: 
- Devuan GNU/Linux, with Linux 3.16.0-5-amd64
- Devuan GNU/Linux, with Linux 3.16.0-5-amd64 (sysvinit)

What is the difference?

fsmithred

Administrator

Registered: 2016-11-25

Posts: 2,486  

Re: /lib/systemd/ folder? and /etc/systemd/ folder?

It's not two different kernels, it's two different entries in the boot menu. Look at the menuentry for each in /boot/grub/grub.cfg to see if there's a difference in the linux lines.

I've only seen that on debian, where you had a choice to boot with sysvinit or systemd. How did you install devuan?

Ducas

Member

From: Netherlands

Registered: 2018-04-04

Posts: 4  

Re: /lib/systemd/ folder? and /etc/systemd/ folder?

Thanks fsmithred,

I Installed the Devuan net-install, without X.

Here the menuentry for each in my /boot/grub/grub.cfg:

}
submenu 'Advanced options for Devuan GNU/Linux' $menuentry_id_option 'gnulinux-advanced-c562ab2a-f161-4647-b133-075f03f08ca4' {
	menuentry 'Devuan GNU/Linux, with Linux 3.16.0-5-amd64' --class devuan --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.16.0-5-amd64-advanced-c562ab2a-f161-4647-b133-075f03f08ca4' {
		load_video
		insmod gzio
		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
		insmod part_msdos
		insmod ext2
		set root='hd0,msdos1'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  bfd5444c-4928-4ba9-9b71-6e9ae93a34df
		else
		  search --no-floppy --fs-uuid --set=root bfd5444c-4928-4ba9-9b71-6e9ae93a34df
		fi
		echo	'Loading Linux 3.16.0-5-amd64 ...'
		linux	/vmlinuz-3.16.0-5-amd64 root=/dev/mapper/debinox--vg-root ro  quiet
		echo	'Loading initial ramdisk ...'
		initrd	/initrd.img-3.16.0-5-amd64
	}
	menuentry 'Devuan GNU/Linux, with Linux 3.16.0-5-amd64 (sysvinit)' --class devuan --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.16.0-5-amd64-init-sysvinit-c562ab2a-f161-4647-b133-075f03f08ca4' {
		load_video
		insmod gzio
		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
		insmod part_msdos
		insmod ext2
		set root='hd0,msdos1'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  bfd5444c-4928-4ba9-9b71-6e9ae93a34df
		else
		  search --no-floppy --fs-uuid --set=root bfd5444c-4928-4ba9-9b71-6e9ae93a34df
		fi
		echo	'Loading Linux 3.16.0-5-amd64 ...'
		linux	/vmlinuz-3.16.0-5-amd64 root=/dev/mapper/debinox--vg-root ro  quiet init=/lib/sysvinit/init
		echo	'Loading initial ramdisk ...'
		initrd	/initrd.img-3.16.0-5-amd64

Thanks for the explanation. There is no real problem here, but I am just curious and want to know what is happening  "under the hood'.

fsmithred

Administrator

Registered: 2016-11-25

Posts: 2,486  

Re: /lib/systemd/ folder? and /etc/systemd/ folder?

The sysvinit entry in the boot menu has 'init=/lib/sysvinit/init'. That gets used in debian when systemd is installed along with sysvinit, and in that case, /sbin/init is a symbolic link pointing to systemd. In devuan, /sbin/init should be the real init (a real file, not a symlink.) Does /lib/sysvinit/init even exist on your setup?

Ducas

Member

From: Netherlands

Registered: 2018-04-04

Posts: 4  

Re: /lib/systemd/ folder? and /etc/systemd/ folder?

Does /lib/sysvinit/init even exist on your setup?

Yes it exists.

Edit:
Just because of curiosity I checked an other devuan computer (desktop) here. Strange thing is that there the /lib/sysvinit/ does NOT exist.
The only difference with my laptop is that I replaced the kernel for libre-kernel 4.16 and installed openbox as the windowmanager.

So on my laptop (devuan core, no X) it does exist, not on my desktop (devuan core + librekernel + Xserver + openbox) ....

Last edited by Ducas (2018-04-04 19:01:48)