**restore**
***********

Restore content from Cyrus backups.


Synopsis
========

   **restore** [OPTIONS] *server* [MODE] *backup* [ *mboxname* | *uniqueid* | *guid* ]...


Description
===========

**restore** is a tool for restoring messages and mailboxes from a
Cyrus backup to a Cyrus IMAP server.  It must be run from the server
containing the backup storage.

**restore** reads its configuration options out of the imapd.conf(5)
file unless specified otherwise by **-C**.

*server* specifies the destination server to which content should be
restored. It should be of the form '*host*[:*port*]', where *host* is
either a hostname, an IPv4 address, or an IPv6 address, and where the
optional *port* is either a known service name (see *services(5)*) or
a decimal port number.  If *port* is omitted, "imap" will be tried
first, followed by "csync".

The destination server must point to either an imapd(8) instance with
the replication capability enabled, or a sync_server(8) instance.  In
either case it must be Cyrus version 3.0 or newer.

**restore** will authenticate to the destination server according to
the **restore_authname**, **restore_password** and **restore_realm**
configuration options.  The credentials should correspond with one of
the destination server's **admins**.

*backup* is interpreted according to the specified MODE. See Modes
below.

If neither **-a** nor **-F** options were provided, then the remaining
arguments constitute a list of objects to be restored.  These may be
mailboxes (specified by either *mboxname* or *uniqueid*) or messages
(specified by their *guid*).  The objects may be specified in any
order, and both mailboxes and individual messages may be restored in
one go.  cyr_backup(8) can be used to identify objects to restore from
a Cyrus backup.

Selected mailboxes will have their messages restored to a mailbox of
the same name, which will be created if necessary.  Individually-
selected messages will be restored to the mailboxes in which they
previously existed.  In both cases the **-M** option can be used to
override the destination mailbox (see below), but note the
consequences of doing this when multiple mailbox objects have been
specified, or when the **-r** option is in use.

Mailboxes that are created during the restoration process will have
their ACL set to the one stored in the backup.  The **-A** option can
be used to override this.  Mailboxes that are not created during the
restoration process (i.e. when restoring into mailboxes that already
exists) will not have their ACLs altered.


Options
=======

-A [acl], --override-acl[=acl]

   Apply specified *acl* to restored mailboxes, rather than their ACLs
   as stored in the backup.

   If *acl* is the empty string (e.g. "-A """) or is unspecified,
   mailboxes will be restored with the default ACL for their
   destination owner.  This is mostly useful when restoring folders
   from one user's backup into a different user's mailbox.

-C config-file

   Use the specified configuration file *config-file* rather than the
   default imapd.conf(5).

-D, --keep-deletedprefix

   Don't trim **deletedprefix** from mailbox names prior to restoring.
   This is mainly useful for rebuilding failed servers, where deleted
   mailboxes should be restored as deleted mailboxes, not as new ones.

   The default is to trim the prefix before restoring.

   If the original server from which the backups were produced had
   **delete_mode** set to *immediate*, then the mailboxes in the
   backup will not have such a prefix, and this option won't have any
   useful effect.

   See imapd.conf(5) for information about the **deletedprefix** and
   **delete_mode** configuration options.

-F input-file, --input-file=input-file

   Get the list of mailboxes or messages from *input-file* instead of
   from the command line arguments.

   *input-file* should contain one object specification (either an
   *mboxname*, a *uniqueid*, or a *guid*) per line.  Empty lines, and
   lines beginning with a '#' character, are ignored.

-L, --local-only

   Local operations only.  Actions required to restore the requested
   mailboxes and messages will be performed on the destination server
   only. mupdate(8) actions will not occur.

   The default is for mupdate actions to occur if the destination
   server is part of a murder.

   This option has no effect if the destination server is not part of
   a murder.

-M mboxname, --dest-mailbox=mboxname

   Messages are restored to the mailbox with the specified *mboxname*.
   If no mailbox of this name exists, one will be created.

   If multiple mailbox objects are to be restored, whether due to
   being specified on the command line, in an *input-file*, or via the
   **-r** option, then the collective contents of all such mailboxes
   will be restored to the single mailbox *mboxname*.  This may not be
   what you want!

   The default when restoring mailboxes is to restore their respective
   contents into mailboxes of the same names.

   The default when restoring individual messages is to restore them
   into their original mailboxes.

-P partition, --dest-partition=partition

   Restore mailboxes to the specified *partition*

-U, --keep-uidvalidity

   Try to preserve uidvalidity and other related fields, such that the
   restored mailboxes and messages appear like they never left, and
   IMAP clients can avoid expensive state updates.

   This can only occur if the mailboxes to be restored **do not**
   already exist on the destination server.  As such, this option is
   mainly useful when rebuilding a failed server.

   If the destination mailboxes already exist, restored messages will
   be appended as if newly delivered, regardless of whether the **-U**
   option was specified.

-X, --skip-expunged

   Do not restore messages that are marked as expunged in the
   *backup*.

   See also **-x**.

-a, --all-mailboxes

   Try to restore all mailboxes in the specified *backup*.

-n, --dry-run

   Do nothing.  The work required to perform the restoration will be
   calculated (and reported depending on verbosity level), but no
   restoration will take place, and no connection will be made to the
   destination server.

   Note that the *server* argument is still mandatory with this
   option.

-r, --recursive

   Recurse into submailboxes.  When restoring mailboxes, also restore
   any mailboxes contained within them.

   The default is to restore only explicitly-specified mailboxes.

-v, --verbose

   Increase the verbosity level.  This option can be specified
   multiple times for additional verbosity.

-w seconds, --delayed-startup=seconds

   Wait *seconds* before starting.  This is useful for attaching a
   debugger.

-x, --only-expunged

   Only restore messages that are marked as expunged in the *backup*.

   This can be convenient for restoring messages that were
   accidentally deleted by the user, without needing to track down
   individual message guids.

   See also **-X**.

-z, --require-compression

   Require compression for server connection.  The restore will abort
   if compression is unavailable.


Modes
=====

-f backup, --file=backup

   *backup* is interpreted as a filename.  The named file does not
   need to be known about in the backups database.

-m backup, --mailbox=backup

   *backup* is interpreted as a mailbox name.  There must be a known
   backup for the user whose mailbox this is.

   Known backups are recorded in the database specified by the
   **backup_db** and **backup_db_path** configuration options.

-u backup, --userid=backup

   *backup* is interpreted as a userid.  There must be a known backup
   for the specified user.

   This is the default if no mode is specified.


Examples
========


History
=======


Files
=====


See Also
========

imapd.conf(5), *services(5)*, cyr_backup(8), imapd(8), mupdate(8),
sync_server(8)
