freebsd-dev/usr.sbin/freebsd-update/freebsd-update.8
Colin Percival 87b66e43a4 "block is set to UTC" -> "clock is set to UTC"
Submitted by:	csjp
2006-12-31 05:18:35 +00:00

153 lines
4.3 KiB
Groff

.\"-
.\" Copyright 2006 Colin Percival
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.\"
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.\" $FreeBSD$
.\"
.Dd August 30, 2006
.Dt FREEBSD-UPDATE 8
.Os FreeBSD
.Sh NAME
.Nm freebsd-update
.Nd fetch and install binary updates to FreeBSD
.Sh SYNOPSIS
.Nm
.Op Fl b Ar basedir
.Op Fl d Ar workdir
.Op Fl f Ar conffile
.Op Fl k Ar KEY
.Op Fl s Ar server
.Op Fl t Ar address
.Cm command ...
.Sh DESCRIPTION
The
.Nm
tool is used to fetch, install, and rollback binary
updates to the FreeBSD base system.
Note that updates are only available if they are being built for the
FreeBSD release and architecture being used; in particular, the
.Fx
Security Team only builds updates for releases shipped in binary form
by the
.Fx
Release Engineering Team, e.g.,
.Fx
6.1-RELEASE and
.Fx
6.2-RC1, but not
.Fx
6.2-STABLE or
.Fx
7.0-CURRENT.
.Sh OPTIONS
The following options are supported
.Bl -tag -width "-f conffile"
.It Fl b Ar basedir
Operate on a system mounted at
.Ar basedir .
(default:
.Pa / ,
or as given in the configuration file.)
.It Fl d Ar workdir
Store working files in
.Ar workdir .
(default:
.Pa /var/db/freebsd-update/ ,
or as given in the configuration file.)
.It Fl f Ar conffile
Read configuration options from
.Ar conffile .
(default:
.Pa /etc/freebsd-update.conf )
.It Fl k Ar KEY
Trust an RSA key with SHA256 of
.Ar KEY .
(default: read value from configuration file.)
.It Fl s Ar server
Fetch files from the specified server or server pool.
(default: read value from configuration file.)
.It Fl t Ar address
Mail output of
.Cm cron
command, if any, to
.Ar address .
(default: root, or as given in the configuration file.)
.El
.Sh COMMANDS
The
.Cm command
can be any one of the following:
.Pp
.Bl -tag -width "-f conffile"
.It Cm fetch
Based on the currently installed world and the configuration
options set, fetch all available binary updates.
.It Cm cron
Sleep a random amount of time between 1 and 3600 seconds,
then download updates as if the
.Cm fetch
command was used.
If updates are downloaded, an email will be sent
(to root or a different address if specified via the
.Fl t
option or in the configuration file).
As the name suggests, this command is designed for running
from
.Xr cron 8 ;
the random delay serves to minimize the probability that
a large number of machines will simultaneously attempt to
fetch updates.
.It Cm install
Install the most recently fetched updates.
.It Cm rollback
Uninstall the most recently installed updates.
.El
.Sh TIPS
.Bl -bullet
.It
If your clock is set to local time, adding the line
.Pp
.Dl 0 3 * * * root /usr/sbin/freebsd-update cron
.Pp
to /etc/crontab will check for updates every night.
If your clock is set to UTC, please pick a random time
other than 3AM, to avoid overly imposing an uneven load
on the server(s) hosting the updates.
.El
.Sh FILES
.Bl -tag -width "/etc/freebsd-update.conf"
.It /etc/freebsd-update.conf
Default location of the
.Nm
configuration file.
.It /var/db/freebsd-update/
Default location where
.Nm
stores temporary files and downloaded updates.
.El
.Sh SEE ALSO
.Xr freebsd-update.conf 5
.Sh AUTHORS
.An Colin Percival Aq cperciva@FreeBSD.org