[Bug 1890827] Re: udev and udevadm documentation missing

[Launchpad Bug Tracker]

[Expired for systemd (Ubuntu) because there has been no activity for 60
days.]

** Changed in: systemd (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1890827

Title:
  udev and udevadm documentation missing

Status in systemd package in Ubuntu:
  Expired

Bug description:
  The man page for udevadm neglects to mention options which seem to
  only be documented in stackexchange.  E.g.

  udevadm monitor --environment

  udevadm control --reload-rules

  From the man page, it's unclear what the difference is between
  /udevadm trigger/ and /udevadm test/.  The description should tell the
  user enough to work out which one they need to use for a certain
  situation.  E.g. I wrote a new rule and it's not triggering.  Is the
  trigger command or the test command suitable for diagnosing the
  problem?

  The documentation in /usr/share/doc/udev/ is strangely specific to
  some esoteric network interface naming.  There is no basic description
  of what udev's purpose is or what its capabilities are.  One of the
  most notable tasks is to react to the insertion of USB drives, and
  there is no mention of this.  The /etc/fstab table also has a role in
  mounting USB drives, but there is no mention as to how udev works with
  /etc/fstab.  I've found that if I remove a line in /etc/fstab and
  attach the drive pertaining to that line, it gets mounted anyway.  If
  the fstab file supercedes udev, then this should be mentioned in the
  documentation.

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