On Sun, Jul 4, 2021, 8:39 PM Clem Cole <clemc@ccc.com> wrote:
Noel.  Pls check the TUHS archives and I think you will see sed does yet exist in 6th edition when Joy wrote head in 1977.  Certainly not yet at UCB.  

V6 doesn't have sed.

Warner

On Sun, Jul 4, 2021 at 9:34 PM Noel Hunt <noel.hunt@gmail.com> wrote:
> But note that when wnj wrote head(1), Joy followed the
> famous `Unix Philosophy' of  doing one (small) job
> well.   Which means he did not add a feature *i.e.*
> abusing, an old program, like cat(1), and add some new
> switch to it that that told the program stop outputting
> after n lines.  Instead Joy wrote a simple new tool.

He didn't need to abuse any existing program by adding new
flags or the like; unless I am mistaken, `sed Nq', for some
number `N', does exactly what `head -N' would do on a single
file, obviating the very need for head(1).

--
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