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.\"
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.\" beadm - Illumos/Solaris-like utility for FreeBSD to manage
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.\" Boot Environments on ZFS filesystems
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\"
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.\" @(#)beadm.1
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.\" $FreeBSD$
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.\"
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.Dd April 26, 2012
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.Dt BEADM 1
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.Os FreeBSD
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.Sh NAME
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.Nm beadm
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.Nd Utility to manage Boot Environments with ZFS
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.Sh SYNOPSIS
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.Nm
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activate
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.Ao Ar beName Ac
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.Nm
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create
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.Op Fl e Ar nonActiveBe | Ar beName@snapshot
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.Ao Ar beName Ac
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.Nm
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create
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.Ao Ar beName@snapshot Ac
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.Nm
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destroy
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.Ao Ar beName Ac
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.Nm
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destroy
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.Ao Ar beName@snapshot Ac
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.Nm
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list
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.Sh DESCRIPTION
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The
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.Nm
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command is used to setup and interact with Boot Environments with ZFS.
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.Pp
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.Em Boot Environments
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allow you to upgrade your system, while preserving your old environment in a separate ZFS dataset.
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.Pp
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.Sh COMMANDS
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The following commands are supported by
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.Nm :
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.Bl -tag -width indent
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.It Ic activate Ar <beName>
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.Pp
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Activate the given
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.Ar beName
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for the next boot.
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.Pp
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.It Ic create
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.Op Fl e Ar nonActiveBe | Ar beName@snapshot
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.Ao Ar beName Ac
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.Pp
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Creates a new boot environment named
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.Ar beName .
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If the -e param is specified, the new environment will be clonsed from the given
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.Ar nonActiveBe | Ar beName@snapshot .
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.Pp
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.It Ic create
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.Ao Ar beName@snapshot Ac
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.Pp
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Creates a snapshot of the existing boot environment named
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.Ar beName .
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.Pp
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.It Ic destroy Ao Ar beName Ac
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.Pp
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Destroys the given
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.Ar beName
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boot environment.
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.It Ic destroy Ao Ar beName@snapshot Ac
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.Pp
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Destroys the given
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.Ar beName@snapshot
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snapshot.
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.Pp
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.It Ic list
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.Pp
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Displays all boot environments.
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.Pp
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.El
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.Sh EXAMPLES
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.Bl -bullet
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.It
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Perform a system upgrade in a
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.Xr jail 8
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.Pp
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Create a new boot environment called
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.Em jailed
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.Pp
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.Dl beadm create -e default jailed
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.Pp
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Set mountpoint for new jail to
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.Pa /usr/jails/jailed
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.Pp
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.Dl zfs set mountpoint=/usr/jails/jailed zroot/ROOT/jailed
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.Pp
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Your current boot environment is now replicated into the jailed system.
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Startup the jail, login and perform the normal upgrade process. Once this is done, stop the jail and disable it in
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.Pa /etc/rc.conf.
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.Pp
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Now activate the boot environment for the next boot
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.Pp
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.Dl beadmn activate jailed
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.Pp
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Reboot into the new environment
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.Pp
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.Dl reboot
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.El
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.Sh HOWTO
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A HOWTO guide is posted at the FreeBSD forums:
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.Bl -bullet
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.It
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.Ar http://forums.freebsd.org/showthread.php?t=31662
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.El
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.Pp
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.Sh SEE ALSO
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.Xr jail 8 ,
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.Xr zfs 8 ,
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.Xr zpool 8
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.Sh HISTORY
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.Xr beadm 1M
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originally appeared in Solaris.
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.Sh AUTHORS
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.An Slawomir Wojciech Wojtczak (vermaden) Aq vermaden@interia.pl
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.An Bryan Drewery Aq bryan@shatow.net
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Wrote the initial manual page, mostly from forum post.
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