9 Dec
2020
9 Dec
'20
1:39 a.m.
Correct. at was a v7-ism. Trying to put a nicer face on the idea - that
is to say, I looked at the "at" command as a user-mode (command) front-end
to cron so you didn't have to edit the crontab yourself. The later had
been around as a system support idea, since at least 6th edition - maybe
5th.
On Tue, Dec 8, 2020 at 1:51 PM Mary Ann Horton <mah(a)mhorton.net> wrote:
My V6 manual has cron(VIII) - documentation of
/usr/lib/crontab - but no
mention of at.
This is consistent with my recollection - I first saw at in V7.
Mary Ann
On 12/8/20 10:11 AM, ron minnich wrote:
When I got into Unix in 1976 cron and at were
both there.
I got to wondering for no particular reason which came first -- I had
always assumed cron, but ...?
Anyone know?