From: arnold@skeeve.com
To: tuhs@minnie.tuhs.org, douglas.mcilroy@dartmouth.edu
Subject: Re: [TUHS] head/sed/tail (was The Unix shell: a 50-year view)
Date: Wed, 14 Jul 2021 22:19:39 -0600 [thread overview]
Message-ID: <202107150419.16F4Jdf9024606@freefriends.org> (raw)
In-Reply-To: <CAKH6PiWDnDBEE9vWRU+6kAuEcMNFdpJ9tiv0=9VUr-LMJRRBbw@mail.gmail.com>
Douglas McIlroy <douglas.mcilroy@dartmouth.edu> wrote:
> -r is weird because it enables backwards reading, but only as
> limited by count. Better would be a program, say revfile, that simply
> reads backwards by lines. Then tail p has an elegant implementation:
> revfile p | head | revfile
The GNU coreutils provides "tac" (c-a-t backwards) which does that
job. It was adopted from a long-ago posting of same on comp.sources.something.
It should be standard on just about any Linux system.
(It too has too many options, but let's not go there.)
Thanks,
Arnold
next prev parent reply other threads:[~2021-07-15 4:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-15 2:38 Douglas McIlroy
2021-07-15 4:19 ` arnold [this message]
2021-07-15 4:25 ` Adam Thornton
2021-07-15 7:20 ` Thomas Paulsen
2021-07-15 14:28 ` Theodore Y. Ts'o
2021-07-15 22:29 ` Bakul Shah
2021-07-15 15:44 Norman Wilson
2021-07-15 16:54 Nelson H. F. Beebe
2021-07-15 19:01 Norman Wilson
2021-07-15 19:27 ` Clem Cole
2021-07-15 19:28 ` Clem Cole
2021-07-15 19:34 ` Warner Losh
2021-07-16 7:38 ` arnold
2021-07-16 16:09 ` Warner Losh
2021-07-16 8:05 ` Lars Brinkhoff
2021-07-16 14:19 ` Clem Cole
2021-07-17 0:34 ` Charles Anthony
2021-07-15 21:26 Paul Ruizendaal
2021-07-15 22:00 Douglas McIlroy
2021-07-15 22:12 ` John Cowan
2021-07-15 22:26 Nelson H. F. Beebe
2021-07-15 23:18 ` Jim Davis
2021-07-16 0:02 ` John Floren
2021-07-16 1:02 ` Nelson H. F. Beebe
2021-07-16 8:27 ` Lars Brinkhoff
2021-07-16 15:28 ` John Floren
2021-07-16 0:02 ` Clem Cole
2021-07-16 0:25 ` Nelson H. F. Beebe
2021-07-16 8:50 ` Lars Brinkhoff
2021-07-16 12:09 Douglas McIlroy
2021-07-16 14:32 ` Bakul Shah
[not found] <CAKH6PiW58PDPb5HRi12aKE+mT+O8AjETr9R51Db6U3KcEp_KkA@mail.gmail.com>
2021-07-16 14:17 ` Nelson H. F. Beebe
2021-07-16 16:13 ` Theodore Y. Ts'o
2021-07-18 20:07 Douglas McIlroy
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