[Bug 1357713] Re: Use essential "init" package to ensure that an init system is present

[Martin Pitt]

Sometimes cgmanager starts up under systemd, then things break (I
haven't seen it break up to the point of not booting, though). You can
try installing systemd-sysv and removing cgmanager to verify this.

Please feel free to report a new bug against systemd for this, as this
is different from enforcing which init system is installed. Thanks!

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https://bugs.launchpad.net/bugs/1357713

Title:
  Use essential "init" package to ensure that an init system is present

Status in “ifupdown” package in Ubuntu:
  Invalid
Status in “init-system-helpers” package in Ubuntu:
  Triaged

Bug description:
  I'm using Ubuntu 14.10 dev with ifupdown 0.7.48.1ubuntu4 and upstart
  1.13.1-0ubuntu3 and currently it is possible to remove ifupdown and
  upstart as they are not essential packages or any essential/manual
  package does depend on them. Here is the output:

  root at ubuntu:/# apt-get remove ifupdown
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages will be REMOVED:
    ifupdown upstart
  0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
  After this operation, 895 kB disk space will be freed.
  Do you want to continue? [Y/n] n
  Abort.

  
  As I know Ubuntu wants to change from upstart to systemd in the future so removing upstart may be fine but I'm wondering why ifupdown can be removed (wouldn't this remove the ability to create a network connection?).

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