Public bug reported:

Hello, the apt documentation on controlling apt phasing is in
apt_preferences(5). However, putting the records into a file in
/etc/apt/preferences.d leads to an error:

$ rg -l APT::Machine-ID  -g '*.xml'
apt_2.2.2ubuntu1/doc/apt_preferences.5.xml
apt_2.3.10/doc/apt_preferences.5.xml
apt_2.3.7/doc/apt_preferences.5.xml
apt_2.1.17/doc/apt_preferences.5.xml
apt_2.3.3/doc/apt_preferences.5.xml
apt_2.3.9/doc/apt_preferences.5.xml
apt_2.4.8/doc/apt_preferences.5.xml
apt_2.2.3/doc/apt_preferences.5.xml
apt_2.5.0/doc/apt_preferences.5.xml
apt_2.4.5/doc/apt_preferences.5.xml
apt_2.3.13/doc/apt_preferences.5.xml
apt_2.2.1/doc/apt_preferences.5.xml
apt_2.3.11/doc/apt_preferences.5.xml
apt_2.3.6/doc/apt_preferences.5.xml
apt_2.1.16/doc/apt_preferences.5.xml
apt_2.3.9ubuntu0.1/doc/apt_preferences.5.xml
apt_2.5.3/doc/apt_preferences.5.xml
apt_2.4.0/doc/apt_preferences.5.xml
apt_2.3.5/doc/apt_preferences.5.xml
apt_2.2.2/doc/apt_preferences.5.xml
apt_2.3.15build1/doc/apt_preferences.5.xml
apt_2.3.15/doc/apt_preferences.5.xml
apt_2.3.8/doc/apt_preferences.5.xml
apt_2.2.4ubuntu0.1/doc/apt_preferences.5.xml
apt_2.4.3/doc/apt_preferences.5.xml
apt_2.1.18/doc/apt_preferences.5.xml


⏚ [sarnold:/etc/apt] $ sudo vim /etc/apt/preferences.d/phased-updates
[sudo] password for sarnold: 
⏚ [sarnold:/etc/apt] 11s $ apt list
E: Invalid record in the preferences file 
/etc/apt/preferences.d/phased-updates, no Package header
⏚ [sarnold:/etc/apt] $ cat /etc/apt/preferences.d/phased-updates
// To have all your machines phase the same, set the same string in this field
// If commented out, apt will use /etc/machine-id to seed the random number 
generator
APT::Machine-ID "aaaabbbbccccddddeeeeffff";

// Always include phased updates
APT::Get::Always-Include-Phased-Updates "1";

// Never include phased updates
# APT::Get::Never-Include-Phased-Updates "1";


Considering how difficult it is to tell which of preferences vs conf should be 
used for which settings, mentioning phasing in both manpages would be very 
kind. However, both manpages should be clear about which one is actually 
correct.

Thanks

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2003759

Title:
  apt phasing should be documented in apt.conf(5) rather than
  apt_preferences(5)

Status in apt package in Ubuntu:
  New

Bug description:
  Hello, the apt documentation on controlling apt phasing is in
  apt_preferences(5). However, putting the records into a file in
  /etc/apt/preferences.d leads to an error:

  $ rg -l APT::Machine-ID  -g '*.xml'
  apt_2.2.2ubuntu1/doc/apt_preferences.5.xml
  apt_2.3.10/doc/apt_preferences.5.xml
  apt_2.3.7/doc/apt_preferences.5.xml
  apt_2.1.17/doc/apt_preferences.5.xml
  apt_2.3.3/doc/apt_preferences.5.xml
  apt_2.3.9/doc/apt_preferences.5.xml
  apt_2.4.8/doc/apt_preferences.5.xml
  apt_2.2.3/doc/apt_preferences.5.xml
  apt_2.5.0/doc/apt_preferences.5.xml
  apt_2.4.5/doc/apt_preferences.5.xml
  apt_2.3.13/doc/apt_preferences.5.xml
  apt_2.2.1/doc/apt_preferences.5.xml
  apt_2.3.11/doc/apt_preferences.5.xml
  apt_2.3.6/doc/apt_preferences.5.xml
  apt_2.1.16/doc/apt_preferences.5.xml
  apt_2.3.9ubuntu0.1/doc/apt_preferences.5.xml
  apt_2.5.3/doc/apt_preferences.5.xml
  apt_2.4.0/doc/apt_preferences.5.xml
  apt_2.3.5/doc/apt_preferences.5.xml
  apt_2.2.2/doc/apt_preferences.5.xml
  apt_2.3.15build1/doc/apt_preferences.5.xml
  apt_2.3.15/doc/apt_preferences.5.xml
  apt_2.3.8/doc/apt_preferences.5.xml
  apt_2.2.4ubuntu0.1/doc/apt_preferences.5.xml
  apt_2.4.3/doc/apt_preferences.5.xml
  apt_2.1.18/doc/apt_preferences.5.xml

  
  ⏚ [sarnold:/etc/apt] $ sudo vim /etc/apt/preferences.d/phased-updates
  [sudo] password for sarnold: 
  ⏚ [sarnold:/etc/apt] 11s $ apt list
  E: Invalid record in the preferences file 
/etc/apt/preferences.d/phased-updates, no Package header
  ⏚ [sarnold:/etc/apt] $ cat /etc/apt/preferences.d/phased-updates
  // To have all your machines phase the same, set the same string in this field
  // If commented out, apt will use /etc/machine-id to seed the random number 
generator
  APT::Machine-ID "aaaabbbbccccddddeeeeffff";

  // Always include phased updates
  APT::Get::Always-Include-Phased-Updates "1";

  // Never include phased updates
  # APT::Get::Never-Include-Phased-Updates "1";

  
  Considering how difficult it is to tell which of preferences vs conf should 
be used for which settings, mentioning phasing in both manpages would be very 
kind. However, both manpages should be clear about which one is actually 
correct.

  Thanks

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https://bugs.launchpad.net/ubuntu/+source/apt/+bug/2003759/+subscriptions


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