文件操作 - restore-worst-case.page

文件: /usr/share/help/nb/deja-dup/restore-worst-case.page

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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" its:version="1.0" type="topic" style="task" id="restore-worst-case" xml:lang="nb">
<info>
 <desc>Hvis du ikke kan gjenopprette filer</desc>
 <link type="guide" xref="index#restore"/>
</info>

<app>Déjà Dup</app> kan svikte, for eksempel i form av programkræsj eller at du får feilmelding når du prøver å gjenopprette noe. Programfeil er det siste du har lyst til å streve med når uhellet er ute. Fyll gjerne ut en <link href="https://launchpad.net/deja-dup/+filebug">feilrapport</link> når du møter problemer. I mellomtiden finner du noen mulige reserveløsninger som du kan prøve med <app>Déjà Dup</app> for å få tilbake tapte data.

<note>Denne forklaringa kan virke teknisk komplisert. Ikke vær redd for å <link xref="support">be om hjelp</link> hvis noe ikke gir mening.</note>

<steps>
 <item>Åpne et <app>Terminal</app>vindu ved å trykke <keyseq><key>Ctrl</key><key>Alt</key><key>T</key></keyseq>.</item>
 <item>Lag mappa hvor gjenopprettede filer skal legges. Denne veiledninga bruker <file its:translate="no">/tmp/restore</file>:
<screen its:translate="no">mkdir -p /tmp/restore</screen></item>
</steps>

<section id="duplicity">
<title>Gjenoppretting med Duplicity</title>

Hvis <app>Déjà Dup</app> ikke fungerer akkurat nå, kan du bruke kommandolinje-verktøyet<app>duplicity</app> som er programmet <app>Déjà Dup</app> normalt kjører på toppen av for å gjøre det enkelt å håndtere sikkerhetskopiering.

<note style="advanced">If you want more information about <app>duplicity</app> than presented here, run <cmd>man duplicity</cmd>.</note>

The first thing we’ll try is a simple restore of all your data. Assuming your files are on an external drive mounted as <file its:translate="no">/media/backup</file> and you chose to encrypt the backup, try this:
<screen its:translate="no">duplicity --gio file:///media/backup /tmp/restore</screen>

If you didn’t encrypt the backup, add <cmd its:translate="no">--no-encryption</cmd> to the command.

<section id="locations">
<title>Other Backup Locations</title>
If you backed up to a remote or cloud server, the syntax you use with <app>duplicity</app> will be different than the external drive example above. See below for how to connect to your chosen backup location.
<note>Remember to add <cmd its:translate="no">--no-encryption</cmd> to any example commands if your backup is not encrypted.</note>
If <app>duplicity</app> appears to be having trouble connecting to your server, try downloading all the <app>duplicity</app> files yourself to a local folder and following the simpler example above.
<terms>
 <item>
 <title>Amazon S3</title>
 Look up your Amazon S3 access key ID and secret access key and replace instances of <var>ID</var> and <var>SECRET</var> in the example below with those respective values.
 You may have specified a folder in which to put the backup files. In the example below, replace any instance of <var>FOLDER</var> with that path.
 <screen its:translate="no">
export AWS_ACCESS_KEY_ID=<var its:translate="yes">ID</var>
export AWS_SECRET_ACCESS_KEY=<var its:translate="yes">SECRET</var>
duplicity s3+http://deja-dup-auto-<var its:translate="yes">LOWERCASE_ID</var>/<var its:translate="yes">FOLDER</var> /tmp/restore</screen>
 </item>
 <item>
 <title>Rackspace Cloud Files</title>
 Look up your Rackspace username and API key and replace instances of <var>USERNAME</var> and <var>KEY</var> in the example below with those respective values.
 You may have specified a container in which to put the backup files. In the example below, replace any instance of <var>CONTAINER</var> with that name.
 <screen its:translate="no">
export CLOUDFILES_USERNAME=<var its:translate="yes">USERNAME</var>
export CLOUDFILES_APIKEY=<var its:translate="yes">KEY</var>
duplicity cf+http://<var its:translate="yes">CONTAINER</var> /tmp/restore</screen>
 </item>
 <item>
 <title>FTP</title>
 Look up your server address, port, username, and password and replace instances of <var>SERVER</var>, <var>PORT</var>, <var>USERNAME</var>, and <var>PASSWORD</var> in the example below with those respective values.
 You may have specified a folder in which to put the backup files. In the example below, replace any instance of <var>FOLDER</var> with that path.
 If you chose to not log in with a username, use <var its:translate="no">anonymous</var> as your <var>USERNAME</var> below.
 <screen its:translate="no">
gvfs-mount ftp://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>:<var its:translate="yes">PORT</var>/<var its:translate="yes">FOLDER</var>
duplicity --gio ftp://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>:<var its:translate="yes">PORT</var>/<var its:translate="yes">FOLDER</var> /tmp/restore</screen>
 </item>
 <item>
 <title>SSH</title>
 Look up your server address, port, username, and password and replace instances of <var>SERVER</var>, <var>PORT</var>, <var>USERNAME</var>, and <var>PASSWORD</var> in the example below with those respective values.
 You may have specified a folder in which to put the backup files. In the example below, replace any instance of <var>FOLDER</var> with that path.
 <screen its:translate="no">
gvfs-mount ssh://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>:<var its:translate="yes">PORT</var>/<var its:translate="yes">FOLDER</var>
duplicity --gio ssh://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>:<var its:translate="yes">PORT</var>/<var its:translate="yes">FOLDER</var> /tmp/restore</screen>
 </item>
 <item>
 <title>WebDAV</title>
 Look up your server address, port, username, and password and replace instances of <var>SERVER</var>, <var>PORT</var>, <var>USERNAME</var>, and <var>PASSWORD</var> in the example below with those respective values.
 You may have specified a folder in which to put the backup files. In the example below, replace any instance of <var>FOLDER</var> with that path.
 If you chose to use a secure connection (HTTPS) when backing up, use <var its:translate="no">davs://</var> instead of <var its:translate="no">dav://</var> in the example below.
 <screen its:translate="no">
gvfs-mount dav://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>:<var its:translate="yes">PORT</var>/<var its:translate="yes">FOLDER</var>
duplicity --gio dav://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>:<var its:translate="yes">PORT</var>/<var its:translate="yes">FOLDER</var> /tmp/restore</screen>
 </item>
 <item>
 <title>Windows Share</title>
 Look up your server address, username, and password and replace instances of <var>SERVER</var>, <var>USERNAME</var>, and <var>PASSWORD</var> in the example below with those respective values.
 You may have specified a folder in which to put the backup files. In the example below, replace any instance of <var>FOLDER</var> with that path.
 If you specified a domain for your Windows server, add it to the beginning of <var>USERNAME</var> with a semicolon between them. For example, <var>domain;username</var>.
 <screen its:translate="no">
gvfs-mount smb://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>/<var its:translate="yes">FOLDER</var>
duplicity --gio smb://<var its:translate="yes">USERNAME</var>@<var its:translate="yes">SERVER</var>/<var its:translate="yes">FOLDER</var> /tmp/restore</screen>
 </item>
</terms>
</section>

</section>

<section id="by-hand">
<title>Restoring by Hand</title>

If even <app>duplicity</app> isn’t working for you, there may be little hope. The backup file format is complicated and not easily manipulated. But if you’re desperate, it’s worth a try.

If you used a remote or cloud server to store your backup, first download all the <app>duplicity</app> files and place them in a folder on your computer. Then enter that folder in your terminal.

<app>Duplicity</app> stores your data in small chunks called volumes. Some volumes belong to the periodic ‘full’ or fresh backups and others to the ‘inc’ or incremental backups. Starting with a full backup set of volumes at volume 1, you’ll need to restore files volume by volume.

If you encrypted your backup, first you must decrypt the volume with <cmd its:translate="no">gpg</cmd>. Say you have <file its:translate="no">duplicity-full.20110127T131352Z.vol1.difftar.gpg</file>:
<screen its:translate="no">gpg --output duplicity-full.20110127T131352Z.vol1.difftar --decrypt duplicity-full.20110127T131352Z.vol1.difftar.gpg</screen>

Or to do all at once (make sure you have plenty of space!):
<screen its:translate="no">gpg --multifile --decrypt duplicity-full.20110127T131352Z.*.difftar.gpg</screen>

Now you have either a <file its:translate="no">.difftar</file> or a <file its:translate="no">.difftar.gz</file> volume (depending on whether you had to decrypt it or not). Use <cmd its:translate="no">tar</cmd> on whichever one you have to extract the individual patch files:
<screen its:translate="no">tar xf duplicity-full.20110127T131352Z.vol1.difftar</screen>

Or again, to do all at once:
<screen its:translate="no">for t in duplicity-full.20110127T131352Z.*.difftar; do tar xf $t; done</screen>

Now the patch files will be in <file its:translate="no">multivolume_snapshot</file> and <file its:translate="no">snapshot</file> folders. Each file that spanned multiple volumes will be in <file its:translate="no">multivolume_snapshot</file>. Let’s say you backed up <file its:translate="no">/home/jane/essay.txt</file>:
<screen its:translate="no">cd multivolume_snapshot/home/jane/essay.txt
cat * &gt; essay.txt</screen>

To recover data from incremental backups, use <cmd its:translate="no">rdiff</cmd> to stitch the files together. See <cmd its:translate="no">man rdiff</cmd> for usage.

</section>

</page>

文件操作 - restore-worst-case.page

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