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mirror_zfs/man/man8/zfs-hold.8

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Reorganize zfs(8) man page into sections Most subcommands got their own manpages (e.g. create). Some related commands grouped into a single manpage and symlinks created (e.g. set, get, and inherit). I did this when topics were either too short to warrant their own file or so interrelated that a user would want to refer between commands in the same file. Corrected .Sx internal references to .Xr cross refs; lots of .Sx references from when text was all in zfs.8 needed to be changed to .Xr zfs-$SUBCOMMAND 8 cross references. Divided subcommand list in zfs(8) into sections of related functionality. This required writing new descriptions for some commands. Preserved ".Os Linux", `.Os` macro parsing behavior differs between mandoc from the "BSD" mandoc package (available on Ubuntu) and man from Ubuntu's man-db package, which calls groff to format the manpages. Groff handles the `.Os` macro differently and wrongly, defaulting it to "BSD" in `/usr/share/groff/*/tmac/mdoc/doc-common`, instead of getting the default from `uname`. A future set of changes will introduce build-time preprocessing of manpages for platform-specific documentation and can insert the correct operating system name. Added SEE ALSO sections, the newly-divided zfs-*.8 subcommand man pages needed their own SEE ALSO sections pointing to related subcommands and, in some cases, documentation from other packages (e.g. zfs-share.8). Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl> Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ross Williams <ross@ross-williams.net> Closes #9559
2019-11-12 22:17:40 +03:00
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.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
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.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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.Dd June 30, 2019
.Dt ZFS-HOLD 8
Remove hard coded "Linux" OS from manpages The recommended practice for `.Os` on FreeBSD is to not specify any arguments. The correct OS name is used automatically. Oddly enough, on the Linux distro I tested this on (CentOS 7), the man pager defaulted to displaying "BSD" as the OS rather than "Linux". To accommodate this, tack " Linux" back on in an install hook on Linux. This is much simpler than removing it for FreeBSD when vendored in the base system. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ryan Moeller <ryan@iXsystems.com> Closes #10760
2020-08-21 21:55:47 +03:00
.Os
Reorganize zfs(8) man page into sections Most subcommands got their own manpages (e.g. create). Some related commands grouped into a single manpage and symlinks created (e.g. set, get, and inherit). I did this when topics were either too short to warrant their own file or so interrelated that a user would want to refer between commands in the same file. Corrected .Sx internal references to .Xr cross refs; lots of .Sx references from when text was all in zfs.8 needed to be changed to .Xr zfs-$SUBCOMMAND 8 cross references. Divided subcommand list in zfs(8) into sections of related functionality. This required writing new descriptions for some commands. Preserved ".Os Linux", `.Os` macro parsing behavior differs between mandoc from the "BSD" mandoc package (available on Ubuntu) and man from Ubuntu's man-db package, which calls groff to format the manpages. Groff handles the `.Os` macro differently and wrongly, defaulting it to "BSD" in `/usr/share/groff/*/tmac/mdoc/doc-common`, instead of getting the default from `uname`. A future set of changes will introduce build-time preprocessing of manpages for platform-specific documentation and can insert the correct operating system name. Added SEE ALSO sections, the newly-divided zfs-*.8 subcommand man pages needed their own SEE ALSO sections pointing to related subcommands and, in some cases, documentation from other packages (e.g. zfs-share.8). Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl> Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ross Williams <ross@ross-williams.net> Closes #9559
2019-11-12 22:17:40 +03:00
.Sh NAME
.Nm zfs Ns Pf - Cm hold
.Nd Hold a snapshot to prevent it being removed with the zfs destroy command.
.Sh SYNOPSIS
.Nm
.Cm hold
.Op Fl r
.Ar tag Ar snapshot Ns ...
.Nm
.Cm holds
.Op Fl rH
.Ar snapshot Ns ...
.Nm
.Cm release
.Op Fl r
.Ar tag Ar snapshot Ns ...
.Sh DESCRIPTION
.Bl -tag -width ""
.It Xo
.Nm
.Cm hold
.Op Fl r
.Ar tag Ar snapshot Ns ...
.Xc
Adds a single reference, named with the
.Ar tag
argument, to the specified snapshot or snapshots.
Each snapshot has its own tag namespace, and tags must be unique within that
space.
.Pp
If a hold exists on a snapshot, attempts to destroy that snapshot by using the
.Nm zfs Cm destroy
command return
.Er EBUSY .
.Bl -tag -width "-r"
.It Fl r
Specifies that a hold with the given tag is applied recursively to the snapshots
of all descendent file systems.
.El
.It Xo
.Nm
.Cm holds
.Op Fl rH
.Ar snapshot Ns ...
.Xc
Lists all existing user references for the given snapshot or snapshots.
.Bl -tag -width "-r"
.It Fl r
Lists the holds that are set on the named descendent snapshots, in addition to
listing the holds on the named snapshot.
.It Fl H
Do not print headers, use tab-delimited output.
.El
.It Xo
.Nm
.Cm release
.Op Fl r
.Ar tag Ar snapshot Ns ...
.Xc
Removes a single reference, named with the
.Ar tag
argument, from the specified snapshot or snapshots.
The tag must already exist for each snapshot.
If a hold exists on a snapshot, attempts to destroy that snapshot by using the
.Nm zfs Cm destroy
command return
.Er EBUSY .
.Bl -tag -width "-r"
.It Fl r
Recursively releases a hold with the given tag on the snapshots of all
descendent file systems.
.El
.El
.Sh SEE ALSO
.Xr zfs-destroy 8
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