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problems with manual page usermod.8 and useradd.8

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Hello,

when updating the German translations of the shadow package, I
encountered strange things in the documentation. For example an option
--non-unique for the commands useradd and usermod. With the first, the
system administrator is able to force the system to create a new user
with an ID that already exists, which is related to another user.

One effect I would expect after using useradd with this option is that
files and directories are owned by two persons - as the UID of a file
indicates the owner.

Has anybody an idea about the purpose of such an option?

>From my point of view it is necessary that the respective manual pages
explain why one might use such an option and / or warn what a mess
might be created with it.

On the debian IRC channel, one comment on this problem was, Linux is a
friendly operating system. It will not prevent users from shooting
themselves in the foot.

Please cc your posts to my mail addresse as I am not a subscriber of
this list.

Best regards
Markus

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Thread

problems with manual page usermod.8 and useradd.8 MarkusHiereth <translation@hiereth.de> - 2018-02-22 22:50 +0100
  Re: problems with manual page usermod.8 and useradd.8 David Wright <deblis@lionunicorn.co.uk> - 2018-02-22 23:20 +0100
  Re: problems with manual page usermod.8 and useradd.8 Greg Wooledge <wooledg@eeg.ccf.org> - 2018-02-22 23:20 +0100
  Re: problems with manual page usermod.8 and useradd.8 Roberto C. Sánchez <roberto@debian.org> - 2018-02-22 23:20 +0100
  Re: problems with manual page usermod.8 and useradd.8 Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-22 23:20 +0100
  Re: problems with manual page usermod.8 and useradd.8 <tomas@tuxteam.de> - 2018-02-23 09:20 +0100

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