On 2019-09-16 at 18:11, Brian wrote: > On Mon 16 Sep 2019 at 15:16:34 -0400, The Wanderer wrote: > >> On 2019-09-16 at 15:07, Brian wrote: >> >>> On Sun 15 Sep 2019 at 21:52:50 -0400, Dan Ritter wrote:
>>>> apt install sysvinit-core >>> >>> What happens if this is not done? >> >> Next time you reboot, you'll have systemd as init. >> >> The dist-upgrade will have resulted in installing the systemd-sysv >> package, which (despite its name) has nothing to do with sysvinit; >> it is the package which sets systemd as the primary / active / >> default init system. >> >> Installing sysvinit-core will uninstall that package. > > What causes systemd-sysv to be installed? I don't know the details for certain. IIRC, once upon a time the sysvinit package had been replaced with a package which depended on 'systemd-sysv | sysvinit-core', but currently I don't see that package in either stable or testing. I suspect that nowadays it's just the fact that so many things have a dependency chain running through libpam-systemd, which nowadays lists a hard dependency on systemd-sysv (IIRC it didn't always). If you happen not to have anything installed which depends on that (which is possible - I've done it - but may be overly restrictive for some people, and I think is outright impossible with either GNOME or KDE), you should indeed be able to transition to current stable without picking up systemd as init. Switching from systemd-sysv to sysvinit-core will wind up removing libpam-systemd in any case, unless I misunderstand matters greatly, so when you run that install command you'll get to find out what parts of your installed system will be removed with the transition. (IMO that once-upon-a-time sysvinit package which only depended on other packages was a nomenclature mistake. We should have arranged things so as to have a package named 'init' which did that, and had it depend on both the previous 'sysvinit' and on 'systemd-init', which latter would be the equivalent to our current 'systemd-sysv'. Having the name of sysv in the set-systemd-as-init package seems like an unfortunate wart, which will likely now be maintained for a long period.) -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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