** Description changed:

+ [Impact]
+ Ubuntu users configuring a custom umask on their system
+ 
+ [Test case]
+ 1) set UMASK in /etc/login.defs to 077
+ 2) Configure netplan to use the networkd renderer, run 'sudo netplan apply'.
+ 3) Verify that systemd-network applies the correct network configuration.
+ 
+ [Regression potential]
+ This enforces setting the umask for the netplan-gnerated configurations to a 
value that allows networkd to read the files for the configuration. If people 
rely on the umask, and have otherwise configured systemd-networkd to be able to 
get the configuration, this would defeat their umask change. The failure more 
for this is something that isn't supported.
+ 
+ ---
+ 
  If you set your UMASK in /etc/login.defs to 077 then after running "netplan 
apply" systemd-networkd won't be able to read its configuration files and start:
  systemd-networkd[2826]: Could not load configuration files: Permission denied
  
  Annoyingly to report such a thing as bug you need a proper network
  connection with working DNS before you submit in ubuntu-bug or it will
  just quit and lose the report. A workaround seems to be to run "ubuntu-
  bug nplan" then in another terminal run "umask 022" then "netplan apply"
  before submitting.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: nplan 0.30
  ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
  Uname: Linux 4.13.0-17-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.5
  Architecture: amd64
  Date: Thu Dec  7 10:20:37 2017
  ProcEnviron:
-  LANGUAGE=en_CA:en
-  TERM=screen
-  PATH=(custom, no user)
-  LANG=en_CA.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_CA:en
+  TERM=screen
+  PATH=(custom, no user)
+  LANG=en_CA.UTF-8
+  SHELL=/bin/bash
  SourcePackage: nplan
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1736965

Title:
  "netplan apply" does not set file mode, umask 077 causes systemd-
  networkd to be unable to start

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