[Bug 1711254] Re: 16.04.3 deployments include non-existent directories in $PATH

[gdahlman]

Note in reference to  ~/.local/bin this path is added because it is a
systemd standard directory.

They are documented in file-hierarchy(7) and also here.

https://www.freedesktop.org/software/systemd/man/file-hierarchy.html

If the issue is that the paths don't exist they should be created for
the user as methods that leverage systemd-path will fail.

$ systemd-path user-binaries

It is also the bin directory for official Ubuntu packages like
virtualenv.

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https://bugs.launchpad.net/bugs/1711254

Title:
  16.04.3 deployments include non-existent directories in $PATH

Status in bash package in Ubuntu:
  Triaged
Status in snapd package in Ubuntu:
  New

Bug description:
  Noticed this while doing regression testing on 16.04.3, and a number
  of customers have asked with concerns as well during their testing.

  I don't know exactly when this started, but we just started noticing
  it with 16.04.3 (4.10) but $PATH by default now includes several
  directories that do not exist:

  ubuntu at above-ox:~$ find $(echo "$PATH" | sed -e 's/:/ /g') -maxdepth 1 -type d
  find: ‘/home/ubuntu/bin’: No such file or directory
  find: ‘/home/ubuntu/.local/bin’: No such file or directory
  /usr/local/sbin
  /usr/local/bin
  /usr/sbin
  /usr/bin
  /sbin
  /bin
  /usr/games
  /usr/local/games
  find: ‘/snap/bin’: No such file or directory

  We noticed this because it was causing a resource job in the
  certification suite to suddenly start failing (the failure was not
  catastrophic, but it did appear to customers who were concerned.

  I've verified this on both s390x and amd64 16.04.3 deployments via
  MAAS 2.2.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1
  ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
  Uname: Linux 4.10.0-32-generic s390x
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: s390x
  Date: Wed Aug 16 18:59:34 2017
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en.US_UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)

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