[arch-general] User/group name restrictions

Guus Snijders gsnijders at gmail.com
Fri May 24 10:07:10 UTC 2019

Op vr 24 mei 2019 07:52 schreef Spencer Collyer <spencer at lasermount.plus.com

> [...]
> >
> The following (taken from
> http://www.catb.org/~esr/faqs/things-every-hacker-once-knew/) may be
> relevant here:
> "The very earliest VDTs, like the ASR-33 before them, could form only
> upper-case letters. An interesting hangover from these devices was that,
> even though most VDTs made after 1975 could form lower-case letters, Unix
> (and Linux as late as 2018) responded to a login beginning with an
> upper-case letter by switching to a mode which upcased all input. If you
> create an account with this sort of login name and a mixed-case password,
> hilarity ensues. If the password is upper-case the hilarity is less
> desperate but still confusing for the user."

In a former job, we had an HP-Ux server, that did have this "feature".
And the fun with "special" characters like @ and  # (erase), which were
handled  different between passwd and login...

Fun times.

Mvg, Guus

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