machine-id file in /etc 25 June 2020, 10:37:13 I noticed today, there is a file named machine-id under` /etc`. What it is for? Does it serve as an unique identifier for repositories? Could someone explain and educate?
Re: machine-id file in /etc Reply #1 – 25 June 2020, 14:50:55 It's used/created by dbus. It's a unique identifier of your box and there's another in /var/lib/dbus/. In our community ISOs, there's a script that changes it at every boot.If you are concerned, you can change it as well at boot or with cron:Code: [Select]dbus-uuidgen >| /var/lib/dbus/machine-iddbus-uuidgen >| /etc/machine-id
Re: machine-id file in /etc Reply #2 – 25 June 2020, 16:42:09 Thank you @nous for the information. Where can I find the script to change machine-id at boot and how to apply it?I am running Artix Plasma, but it is a self-constructed version and therefore does not have this script.Best regards.
Re: machine-id file in /etc Reply #3 – 28 June 2020, 00:04:45 Just put those dbus-uuidgen commands in your /etc/rc.local!
Re: machine-id file in /etc Reply #4 – 28 June 2020, 01:55:17 /var/lib/dbus and thus /var/lib/dbus/machine-id doesn't exist at all on my system, while /etc/machine-id does. Hasn't seemed to cause problems.I didn't have an /etc/rc.local, although I could have made one like this:https://wiki.artixlinux.org/Main/OpenRC#rc.localso I put the command in /etc/local.d/file.start instead and made it executable which worked, with the local service enabled. Last Edit: 28 June 2020, 03:42:57 by ####### 1 Likes
Re: machine-id file in /etc Reply #5 – 28 June 2020, 12:39:18 Quote from: ####### – on 28 June 2020, 01:55:17/var/lib/dbus and thus /var/lib/dbus/machine-id doesn't exist at all on my system, while /etc/machine-id does. Hasn't seemed to cause problems.I didn't have an /etc/rc.local, although I could have made one like this:https://wiki.artixlinux.org/Main/OpenRC#rc.localso I put the command in /etc/local.d/file.start instead and made it executable which worked, with the local service enabled.I followed your method as well...works as expected. Best regards.
Re: machine-id file in /etc Reply #6 – 28 June 2020, 14:43:25 Quote from: nous – on 25 June 2020, 14:50:55It's used/created by dbus. It's a unique identifier of your box and there's another in /var/lib/dbus/. In our community ISOs, there's a script that changes it at every boot.If you are concerned, you can change it as well at boot or with cron:Code: [Select]dbus-uuidgen >| /var/lib/dbus/machine-iddbus-uuidgen >| /etc/machine-idI'd advise against two uuids, just symlink /var/lib/dbus/machine-id to /etc. 1 Likes
Re: machine-id file in /etc Reply #7 – 29 July 2023, 23:15:26 For anyone who comes here by some search on the topic, and a follow-up:Quote from: nous – on 25 June 2020, 14:50:55If you are concerned, you can change it as well at boot[...]:Code: [Select]dbus-uuidgen >| /var/lib/dbus/machine-iddbus-uuidgen >| /etc/machine-idThere is now a package in the AUR which does this: random_machine_id-openrc.Quote from: nous – on 25 June 2020, 14:50:55or with cronIs changing the machine ID during runtime of dbus supported and does not lead to strange behaviour?By the way, /var/lib/dbus/machine-id does no longer exist (I don't have a /var/lib/dbus/ at all). random_machine_id-openrc caters for that since it tests the existence of /var/lib/dbus/.Maybe someone with Wiki edit rights can also put the information into the corresponding wiki page?
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