From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, NICE_REPLY_A,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 27302 invoked from network); 23 Feb 2021 21:02:46 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 23 Feb 2021 21:02:46 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 48E649C73E; Wed, 24 Feb 2021 07:02:43 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id C0B819C6D0; Wed, 24 Feb 2021 07:02:21 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 47FA79C6D0; Wed, 24 Feb 2021 07:02:19 +1000 (AEST) Received: from mail.kaybuena.com (rrcs-71-42-153-194.sw.biz.rr.com [71.42.153.194]) by minnie.tuhs.org (Postfix) with ESMTPS id AB1EA9C6CE for ; Wed, 24 Feb 2021 07:02:09 +1000 (AEST) Received: from [192.168.147.6] (4dot2 [71.42.153.195]) by mail.kaybuena.com (8.15.2/8.15.2) with ESMTP id 11NL20cO1748139 for ; Tue, 23 Feb 2021 15:02:01 -0600 To: tuhs@minnie.tuhs.org References: From: "Charles H. Sauer" Message-ID: <91696417-3233-232e-e1f4-3cb914202801@technologists.com> Date: Tue, 23 Feb 2021 15:02:00 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.2 (mail.kaybuena.com [71.42.153.194]); Tue, 23 Feb 2021 15:02:01 -0600 (CST) Subject: Re: [TUHS] Abstractions X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" 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/ - > ------------------------------------------------------------------------------- > -- voice: +1.512.784.7526 e-mail: sauer@technologists.com fax: +1.512.346.5240 Web: https://technologists.com/sauer/ Facebook/Google/Skype/Twitter: CharlesHSauer