Essential packages not installed will be installed automatically by APT,
packages with the Important field will not be. Important also does not
have the same ordering requirements as Essential. It's main use case is
building configuration metapackages:

But yes, this is not specified at all - it is an APT-specific feature.
People do not like the field name, because it can be confused with
Priority: important, so it has not been standardized and included in
dpkg yet - also see and for further

Once this has a new name and is standardized we can actually produce
good error messages.

** Changed in: apt (Ubuntu)
   Importance: Undecided => Low

** Changed in: apt (Ubuntu)
       Status: New => Triaged

** Bug watch added: Debian Bug tracker #826587

** Also affects: apt (Debian) via
   Importance: Unknown
       Status: Unknown

You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to apt in Ubuntu.

  "Important" control field is a bit confusing

Status in apt package in Ubuntu:
Status in init-system-helpers package in Ubuntu:
Status in apt package in Debian:

Bug description:
  I'm using Ubuntu 16.10 dev and noticing that the package init seems to
  be the only one with the "Important" control field which seems to be a
  bit curious:

  - On removing a package with apt that has the "Important" field set to "yes" 
it seems to show the same warning like removing a package that has the 
"Essential" field set to "yes". Even the same term "essential" is used instead 
of "important" (maybe this should be changed?).
  - "man deb-control" does not know this field and removing a package with dpkg 
that has the "Important" field set to "yes" does not throw an error while 
removing a package that has the "Essential" field set to "yes" does.
  - I'm wondering what the difference between the "Essential" and "Important" 
field for apt is. I can't find any information about it and can't also find the 
manpage that documents the custom control fields that apt but not dpkg knows 
(does such a manpage exist?).
  - I'm also wondering why init uses this control field instead of the 
"Essential" control field as this would additionally prevent removing it by 
accident with dpkg.

To manage notifications about this bug go to:

Mailing list:
Post to     :
Unsubscribe :
More help   :

Reply via email to