From: "Charles H. Sauer" <sauer@technologists.com>
To: tuhs@minnie.tuhs.org
Subject: Re: [TUHS] Abstractions
Date: Tue, 23 Feb 2021 15:02:00 -0600 [thread overview]
Message-ID: <91696417-3233-232e-e1f4-3cb914202801@technologists.com> (raw)
In-Reply-To: <CMM.0.96.0.1614109077.beebe@gamma.math.utah.edu>
To add to the inventory below:
Dell SVR4 /bin is a symlink to /usr/bin
NEXTSTEP/486 3.3 /bin and /usr/bin are separate
On 2/23/2021 1:37 PM, Nelson H. F. Beebe wrote:
> The recent discussions on the TUHS list of whether /bin and /usr/bin
> are different, or symlinked, brought to mind the limited disk and tape
> sizes of the 1970s and 1980s. Especially the lower-cost tape
> technologies had issues with correct recognition of an end-of-tape
> condition, making it hard to span a dump across tape volumes, and
> strongly suggesting that directory tree sizes be limited to what could
> fit on a single tape.
>
> I made an experiment today across a broad range of operating systems
> (many with multiple versions in our test farm), and produced these two
> tables, where version numbers are included only if the O/S changed
> practices:
>
> ------------------------------------------------------------------------
> Systems with /bin a symlink to /usr/bin (or both to yet another common
> directory) [42 major variants]:
>
> ArchLinux Kali RedHat 8
> Arco Kubuntu 19, 20 Q4OS
> Bitrig Lite ScientificLinux 7
> CentOS 7, 8 Lubuntu 19 Septor
> ClearLinux Mabox Solaris 10, 11
> Debian 10, 11 Magiea Solydk
> Deepin Manjaro Sparky
> DilOS Mint 20 Springdale
> Dyson MXLinux 19 Ubuntu 19, 20, 21
> Fedora Neptune UCS
> Gnuinos Netrunner Ultimate
> Gobolinux Oracle Linux Unleashed
> Hefftor Parrot 4.7 Void
> IRIX PureOS Xubuntu 19, 20
>
> ------------------------------------------------------------------------
> Systems with separate /bin and /usr/bin [60 major variants]:
>
> Alpine Hipster OS108
> AltLinux KaOS Ovios
> Antix KFreeBSD PacBSD
> Bitrig Kubuntu 18 Parrot 4.5
> Bodhi LibertyBSD PCBSD
> CentOS 5, 6 LMDE PCLinuxOS
> ClonOS Lubuntu 17 Peppermint
> Debian 7--10 LXLE Salix
> DesktopBSD macOS ScientificLinux 6
> Devuan MidnightBSD SlackEX
> DragonFlyBSD Mint 18--20 Slackware
> ElementaryOS MirBSD Solus
> FreeBSD 9--13 MXLinux 17, 18 T2
> FuryBSD NetBSD 6-1010 Trident
> Gecko NomadBSD Trisquel
> Gentoo OmniOS TrueOS
> GhostBSD OmniTribblix Ubuntu 14--18
> GNU/Hurd OpenBSD Xubuntu 18
> HardenedBSD OpenMandriva Zenwalk
> Helium openSUSE Zorinos
>
> ------------------------------------------------------------------------
>
> Some names appear in both tables, indicating a transition from
> separate directories to symlinked directories in more recent O/S
> releases.
>
> Many of these system names are spelled in mixed lettercase, and if
> I've botched some of them, I extend my apologies to their authors.
>
> Some of those systems run on multiple CPU architectures, and our test
> farm exploits that; however, I found no instance of the CPU type
> changing the separation or symbolic linking of /bin and /usr/bin.
>
> -------------------------------------------------------------------------------
> - Nelson H. F. Beebe Tel: +1 801 581 5254 -
> - University of Utah FAX: +1 801 581 4148 -
> - Department of Mathematics, 110 LCB Internet e-mail: beebe@math.utah.edu -
> - 155 S 1400 E RM 233 beebe@acm.org beebe@computer.org -
> - Salt Lake City, UT 84112-0090, USA URL: http://www.math.utah.edu/~beebe/ -
> -------------------------------------------------------------------------------
>
--
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next prev parent reply other threads:[~2021-02-23 21:02 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-23 19:37 Nelson H. F. Beebe
2021-02-23 21:02 ` Charles H. Sauer [this message]
2021-02-23 21:15 ` Henry Bent
2021-02-24 2:47 ` Greg A. Woods
2021-02-24 3:20 ` Warner Losh
2021-02-24 20:05 ` Greg A. Woods
2021-02-24 1:51 ` Greg A. Woods
2021-02-24 2:23 ` Nelson H. F. Beebe
-- strict thread matches above, loose matches on Subject: below --
2021-02-24 4:18 Rudi Blom
2021-02-21 10:47 Paul Ruizendaal
2021-02-20 23:09 M Douglas McIlroy
2021-02-21 8:15 ` Otto Moerbeek
2021-02-21 11:08 ` Rich Morin
2021-02-21 22:40 ` Dave Horsfall
2021-02-21 23:01 ` Steve Nickolas
2021-02-23 3:31 ` Andrew Warkentin
2021-02-22 0:13 ` Warren Toomey
2021-02-27 2:47 ` Dave Horsfall
2021-02-23 0:25 ` Wesley Parish
2021-02-23 0:38 ` Steve Nickolas
2021-02-23 2:50 ` Theodore Ts'o
2021-02-23 3:19 ` Warner Losh
2021-02-23 1:47 ` Theodore Ts'o
2021-02-21 22:54 ` Clem Cole
2021-02-15 19:56 Jon Steinhart
2021-02-15 21:52 ` Dave Horsfall
2021-02-16 7:13 ` arnold
2021-02-16 8:15 ` Tom Ivar Helbekkmo via TUHS
2021-02-16 10:04 ` Wesley Parish
2021-02-16 19:59 ` Jon Steinhart
2021-02-17 4:01 ` Theodore Ts'o
2021-02-17 6:50 ` Chris Hanson
2021-02-16 12:26 ` Rich Morin
2021-02-16 22:46 ` Steffen Nurpmeso
2021-02-17 12:09 ` David Arnold
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