mirror of https://github.com/borgbackup/borg.git
126 lines
3.9 KiB
ReStructuredText
126 lines
3.9 KiB
ReStructuredText
.. include:: global.rst.inc
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.. _quickstart:
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Quick Start
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===========
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This chapter will get you started with |project_name|. The first section
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presents a simple step by step example that uses |project_name| to backup data.
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The next section continues by showing how backups can be automated.
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A step by step example
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----------------------
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1. Before any backup can be taken a repository has to be initialized::
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$ attic init /somewhere/my-backup.attic
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2. Backup the ``~/src`` and ``~/Documents`` directories into an archive called
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*first-backup*::
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$ attic create -v /somwhere/my-backup.attic::first-backup ~/src ~/Documents
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3. The next day create a new archive called *second-backup*::
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$ attic create -v --stats /somwhere/my-backup.attic::second-backup ~/src ~/Documents
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This backup will be a lot quicker and a lot smaller since only new never
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before seen data is stored. The ``--stats`` causes |project_name| to output
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statistics about the newly created archive such as the amount of unique
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data (not shared with other archives).
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4. List all archives in the repository::
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$ attic list /somewhere/my-backup.attic
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5. List the contents of the *first-backup* archive::
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$ attic list /somewhere/my-backup.attic::first-backup
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6. Restore the *first-backup* archive::
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$ attic extract -v /somwhere/my-backup.attic::first-backup
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7. Recover disk space by manually deleting the *first-backup* archive::
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$ attic delete /somwhere/my-backup.attic::first-backup
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Automating backups
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------------------
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The following example script backups up ``/home`` and
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``/var/www`` to a remote server. The script also uses the
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:ref:`attic_prune` subcommand to maintain a certain number
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of old archives::
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#!/bin/sh
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REPOSITORY=username@remoteserver.com:backup.attic
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# Backup all of /home and /var/www except a few
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# excluded directories
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attic create --stats \
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$REPOSITORY::hostname-`date +%Y-%m-%d` \
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/home \
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/var/www \
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--exclude /home/*/.cache \
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--exclude /home/Ben/Music/Justin\ Bieber \
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--exclude *.pyc
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# Use the `prune` subcommand to maintain 7 daily, 4 weekly
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# and 6 monthly archives.
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attic prune -v $REPOSITORY --daily=7 --weekly=4 --monthly=6
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.. Note::
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This script assumes the repository has already been initalized with
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:ref:`attic_init`.
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.. _encrypted_repos:
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Repository encryption
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---------------------
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Repository encryption is enabled at repository encryption time::
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$ attic init --passphrase | --key-file
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When repository encryption is enabled all data is encrypted using 256-bit AES_
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encryption and the integrity and authenticity is verified using `HMAC-SHA256`_.
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|project_name| supports two different methods to derive the AES and HMAC keys.
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Passphrase based encryption
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This method uses a user supplied passphrase to derive the keys using the
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PBKDF2_ key derivation function. This method is convenient to use and
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secure as long as a *strong* passphrase is used.
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.. Note::
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For automated backups the passphrase can be specified using the
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`ATTIC_PASSPHRASE` environment variable.
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Key file based encryption
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This method generates random keys at repository initialization time that
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are stored in a password protected file in the ``~/.attic/keys/`` directory.
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This method is secure and suitable for automated backups.
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.. Note::
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The repository data is totally inaccessible without the key file
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so it must be kept **safe**.
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.. _remote_repos:
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Remote repositories
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-------------------
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|project_name| can initialize and access repositories on remote hosts as the
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host is accessible using SSH and |project_name| is installed.
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The following syntax is used to address remote repositories::
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$ attic init user@hostname:repository.attic
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or::
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$ attic init ssh://user@hostname:port/repository.attic
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