"shutdown
Is a new command which shuts the system down at a specified time."
Bug fixes and changes in 4.1bsd
May 10, 1981
from bitsavers bits/BSD/BSD4.1_bootable.tap.gz
/usr/man/man0/changes.4-81
There may have been some confusion when checking against CSRG archives.
The 4.1 there is 4.0 with a "4.0.upgrade" directory with 4.1 files such
as 4.0.upgrade/etc/shutdown. And 4.1a isn't a full tree.
In SCCS shutdown.c starts on Feb 7 1981.
-.\" $OpenBSD: shutdown.8,v 1.42 2022/08/05 09:15:28 schwarze Exp $
+.\" $OpenBSD: shutdown.8,v 1.43 2023/02/04 13:03:58 jsg Exp $
.\" $NetBSD: shutdown.8,v 1.6 1995/03/18 15:01:07 cgd Exp $
.\"
.\" Copyright (c) 1988, 1991, 1993
.\"
.\" @(#)shutdown.8 8.1 (Berkeley) 6/5/93
.\"
-.Dd $Mdocdate: August 5 2022 $
+.Dd $Mdocdate: February 4 2023 $
.Dt SHUTDOWN 8
.Os
.Sh NAME
.Nm
command first appeared outside of Bell Labs in PWB/UNIX 1.0
and has been available since
-.Bx 4.1c .
+.Bx 4.1 .